feat: adding includes helper for templating

[juancarlosjr97]

Changes

Adding a custom helper for handlebars as includes that will check if a list of strings will be valid for a template configuration.

• Add includes handlebars

Context

#27818

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

All tests are passing locally with 100% code coverage

This has been tested also on a PR with a public project juancarlosjr97/renovate-test-27818#13

Commit updated by template: juancarlosjr97/renovate-test-27818@791e2ae

chore(deps): update all dependencies
Jest Dependency

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": ["config:base", "group:all"],
  "packageRules": [
    {
      "matchDepTypes": ["*"],
      "addLabels": ["jest"]
    },
    {
      "matchPackagePatterns": ["*"],
      "labels": ["jest"],
      "commitBody": "{{#if (includes labels 'jest')}}Jest Dependency{{else}}Other Libraries{{/if}}"
    }
  ],
  "fetchChangeLogs": "off"
}

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[juancarlosjr97]

Pick the changes from #27939 to merge the includes handlebars and then work on the other changes of the depTypes for templating.

[renovate-release]

🎉 This PR is included in version 37.273.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.273.0

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