Add action for bumping version on release

[stdevMac]

Fixes #4794

Changes

• Added new GitHub Action workflow to automatically bump version on master after release branch creation
• The workflow triggers when a new release/* branch is created
• Automatically increments the minor version and adds -unstable suffix
• Creates a pull request instead of direct push to master for better review process
• Handles all version types correctly:
  • Regular releases (e.g., release/1.31.0 -> 1.32.0-unstable)
  • Major releases (e.g., release/2.0.0 -> 2.1.0-unstable)
  • Patch releases (e.g., release/1.30.3 -> 1.31.0-unstable)

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Build-related changes
• Refactoring
• Documentation update
• Other: Description

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

Notes on testing

The workflow should be tested by:

1. Creating a test release branch
2. Verifying that a PR is created automatically
3. Checking that the version is bumped correctly in Directory.Build.props
4. Verifying the PR content and format

Documentation

Requires documentation update

• Yes
• No

Requires explanation in Release Notes

• Yes
• No

Remarks

This automation will help maintain consistent version numbering across releases and development branches, reducing manual intervention and potential human error in version management.

[rubo]

• Minor revisions
• Created the label; otherwise, the creation of PR fails
• Tested