Run the E2E Tests workflow on every pull request

[eason9487]

Changes proposed in this Pull Request:

The E2E Tests workflow previously ran only for pushes and pull requests around release/** branches, so the regressions it guards went unnoticed until release time. With the suite now at 85 tests and hardened for CI, this PR turns it into a per-PR check.

Trigger changes:

• pull_request now runs for every pull request, with a paths-ignore list that skips documentation-only changes.
• push now also covers trunk for a post-merge signal.
• Pushes to release/** keep their trigger. Releases are built from the latest commit on the release branch, but a pull_request run does not test that commit; it tests a temporary merge commit that GitHub creates from the PR and its target branch. The push trigger is what tests the exact commit that will be released.

Checks:

• Does your code follow the WordPress coding standards?
• Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Detailed test instructions:

1. Confirm the E2E Tests workflow is triggered on this pull request itself.
2. Confirm the E2E Tests workflow run passes.
3. After merging, confirm the workflow also runs on the push to trunk.

Changelog entry

[coderabbitai]

Important

Review skipped

Review was skipped due to path filters

⛔ Files ignored due to path filters (1)

• .github/workflows/e2e-tests.yml is excluded by none and included by none

CodeRabbit blocks several paths by default. You can override this behavior by explicitly including those paths in the path filters. For example, including **/dist/** will override the default block on the dist directory, by removing the pattern from both the lists.

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Plan: Pro Plus

Run ID: 36256446-b12a-4af1-9cff-158cfd37e30c

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Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dev/run-e2e-ci-on-all-prs

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[Copilot]

Pull request overview

This PR updates the E2E Tests GitHub Actions workflow so end-to-end tests run as a standard per-PR check (instead of only around release/**), with documentation-only changes excluded via paths-ignore. This improves earlier detection of regressions and adds a post-merge signal on trunk.

Changes:

• Expand pull_request trigger to run on all PRs, while skipping doc-only changes via paths-ignore.
• Expand push trigger to include trunk (while keeping release/**) so merges and release-branch commits both get tested.

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[eason9487]

The official Patterns to match file paths of GitHub Actions document the equivalent pattern '**.js' as "Matches all .js files in the repository", so '**.md' should be correct here.