chore: add issue template forms (#1162)

.github/ISSUE_TEMPLATE/01-issue-browser.yml

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+name: 'Bug report (Browser)'
+description: I experience unexpected behavior using the library in a browser.
+labels: ['bug', 'scope:browser', 'needs:triage']
+body:
+  - type: markdown
+    attributes:
+      value: Thank you for reporting an issue to Mock Service Worker! Please fill in the template below to help our team tackle it in the most efficient way.
+
+  - type: checkboxes
+    attributes:
+      label: Prerequisites
+      description: Before we begin, let's make sure your issue hasn't been solved already.
+      options:
+        - label: I confirm my issue is not in the [opened issues](https://github.com/mswjs/msw/issues)
+          required: true
+        - label: I confirm the [Frequently Asked Questions](https://mswjs.io/docs/faq) didn't contain the answer to my issue
+          required: true
+
+  - type: checkboxes
+    attributes:
+      label: Environment check
+      options:
+        - label: I'm using the [latest](https://github.com/mswjs/msw/releases/latest) `msw` version
+          required: true
+        - label: I'm using Node.js version 14 or higher
+          required: true
+
+  - type: dropdown
+    attributes:
+      label: Browsers
+      description: Select in which browser(s) you're experiencing the issue.
+      multiple: true
+      options:
+        - 'Chromium (Chrome, Brave, etc.)'
+        - 'Firefox'
+        - 'Safari'
+
+  - type: input
+    attributes:
+      label: Reproduction repository
+      description: A URL to a GitHub repository where your issue can be reproduced. Issues without a reproduction repository **will be closed**.
+      placeholder: i.e. https://github.com/you/msw-issue
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Reproduction steps
+      description: Include any steps necessary to reproduce the issue in the repository above.
+      placeholder: i.e. "npm test"
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Current behavior
+      description: Share any details on what behavior you're experiencing (error messages, logs, context).
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Expected behavior
+      description: What do you expect to happen instead?
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/02-issue-nodejs.yml

@@ -0,0 +1,65 @@
+name: 'Bug report (Node.js)'
+description: I experience unexpected behavior using the library in Node.js (Jest/React Native/Express/etc.).
+labels: ['bug', 'scope:node', 'needs:triage']
+body:
+  - type: markdown
+    attributes:
+      value: Thank you for reporting an issue to Mock Service Worker! Please fill in the template below to help our team tackle it in the most efficient way.
+
+  - type: checkboxes
+    attributes:
+      label: Prerequisites
+      description: Before we begin, let's make sure your issue hasn't been solved already.
+      options:
+        - label: I confirm my issue is not in the [opened issues](https://github.com/mswjs/msw/issues)
+          required: true
+        - label: I confirm the [Frequently Asked Questions](https://mswjs.io/docs/faq) didn't contain the answer to my issue
+          required: true
+
+  - type: checkboxes
+    attributes:
+      label: Environment check
+      description: Next, let's make sure you're using the library in the officially supported environments.
+      options:
+        - label: I'm using the [latest](https://github.com/mswjs/msw/releases/latest) `msw` version
+          required: true
+        - label: I'm using Node.js version 14 or higher
+          required: true
+
+  - type: input
+    attributes:
+      label: Node.js version
+      description: Specify which Node.js version you're using (`node -v`).
+      placeholder: i.e. v16.14.0
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: Reproduction repository
+      description: A URL to a GitHub repository where we can reproduce your issue. Issues without a reproduction repository **will be closed**.
+      placeholder: i.e. https://github.com/you/msw-issue
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Reproduction steps
+      description: Include any steps necessary to reproduce the issue in the repository above.
+      placeholder: i.e. "npm test"
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Current behavior
+      description: Share any details on what behavior you're experiencing (error messages, logs, context).
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Expected behavior
+      description: What do you expect to happen instead?
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/03-feature.yml

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+name: 'Feature request'
+description: Propose a feature or improvement.
+labels: [feature]
+body:
+  - type: markdown
+    attributes:
+      value: Thank you for deciding to make Mock Service Worker better! Please fill in the form below so our team could understand your feature better.
+
+  - type: dropdown
+    attributes:
+      label: Scope
+      description:
+      multiple: false
+      options:
+        - 'Adds a new behavior'
+        - 'Improves an existing behavior'
+    validations:
+      required: true
+
+  - type: checkboxes
+    attributes:
+      label: Compatibility
+      description: Check if your proposal is a breaking change. Leave this field unchecked if not sure.
+      options:
+        - label: This is a breaking change
+          required: false
+
+  - type: textarea
+    attributes:
+      label: Feature description
+      description: "Describe the feature you're suggesting. Be as detailed as possible: include behavior description, pseudo-code snippets, comparison to similar features."
+    validations:
+      required: true