Add support for conditional settings based on GitHub event triggers (#2238)

### ❔What, Why & How

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their task -->
This pull request adds support for using workflow trigger events as a
condition in `ConditionalSettings`, allowing you to apply settings based
on the GitHub Actions event type (e.g., `push`, `pull_request`,
`schedule`, `workflow_dispatch`). Documentation and tests are updated to
reflect this new feature.

**Conditional settings enhancements:**
* Added a new `triggers` condition to `ConditionalSettings`, enabling
settings to be applied based on the value of `GITHUB_EVENT_NAME` (such
as `push`, `pull_request`, `schedule`, `workflow_dispatch`)

**Documentation updates:**
* Updated `settings.md` and `RELEASENOTES.md` to document the new
`triggers` condition, including usage examples.

**Test coverage:**
* Extended tests in `ReadSettings.Test.ps1` to verify correct behavior
when using the new `triggers` condition in `ConditionalSettings`.

Related to issue: https://github.com/microsoft/AL-Go/discussions/2207

### ✅ Checklist

- [x] Add tests (E2E, unit tests)
- [x] Update RELEASENOTES.md
- [x] Update documentation (e.g. for new settings or scenarios)
- [ ] Add telemetry

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Co-authored-by: Copilot <copilot@github.com>
Co-authored-by: Maria Zhelezova <43066499+mazhelez@users.noreply.github.com>