chore(ci): add actionlint (VIV-000)

[RichardHelm]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d61b119) to head (bfe0452).
⚠️ Report is 1707 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #2652     +/-   ##
===========================================
  Coverage   100.00%   100.00%             
===========================================
  Files          123       430    +307     
  Lines         1562     10177   +8615     
  Branches       108      1868   +1760     
===========================================
+ Hits          1562     10177   +8615     

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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[Copilot]

Pull request overview

This PR updates GitHub Actions workflow dependencies to their latest versions and modernizes deprecated workflow syntax to comply with actionlint recommendations, including the addition of actionlint as a linting step for workflow files.

Key changes:

• Updated GitHub Actions to newer major versions (checkout@v4, codeql-action@v3, stale@v9, etc.)
• Replaced deprecated ::set-output commands with the modern $GITHUB_OUTPUT syntax
• Added actionlint workflow validation step

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/stale.yml	Updated actions/stale from v4 to v9
.github/workflows/release-please.yml	Updated actions/github-script to v7 and migrated set-output syntax
.github/workflows/pre-release.yml	Updated checkout to v4, added missing step ID, migrated set-output syntax
.github/workflows/codeql-analysis.yml	Updated checkout to v4 and codeql-action to v3
.github/workflows/_unit-test.yml	Updated checkout to v4, codecov-action to v4, added missing step ID
.github/workflows/_publish.yml	Updated checkout to v4 and added proper quoting for shell arguments
.github/workflows/_lint.yml	Updated checkout to v4 and added actionlint validation step
.github/workflows/_deploy-deno.yml	Updated checkout to v4
.github/workflows/_check-metadata.yml	Updated checkout to v4 and improved GITHUB_OUTPUT variable quoting
.github/workflows/_build.yml	Updated checkout to v4

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[RichardHelm]

@copilot Resolve the conflicts with main

[Copilot]

@RichardHelm I've opened a new pull request, #2666, to work on those changes. Once the pull request is ready, I'll request review from you.

[RichardHelm]

@copilot Fix the issues identified by actionlint

[Copilot]

@RichardHelm I've opened a new pull request, #2667, to work on those changes. Once the pull request is ready, I'll request review from you.