Test) Terminal Shell Type proposed API

[anthonykim1]

Refs: #230165

• macOS @sandy081
• linux @karthiknadig
• windows @cwebster-99

Complexity: 3

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Thank you in advance for testing.

Background Information

There are many times extensions try to predict the type of shell user is using for their Terminal.

This iteration, I added an proposed API https://github.com/microsoft/vscode/blob/e8346324cfb8b5d680ad657bb67153eb838aebc5/src/vscode-dts/vscode.proposed.terminalShellType.d.ts where shell type information is exposed from core to extensions.
Each of the enums provided meant to specify the type of the specific shell.

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Setup

• Please test this with wide variety of enum shells listed in the proposed API doc.
• Make sure to enable proposed api name: terminalShellType

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Testing

1. Feel free to test on extension on your own.
2. Subscribing to window.onDidChangeTerminalState and watch the shellType field.
3. Make sure you get the "correct" shell enum depending on which shell you open inside VS Code

[sandy081]

Tested for Zsh, Fish, Bash & PowerShell.

[cwebster-99]

Tested for git bash, pwsh, and cmd