Automate release process

[wordpressfan]

Description

Fixes #6104

Documentation

User documentation

That's for internal use to release internal releases as follows:

1. Make sure that everything is merged into develop.
2. Update the plugin base file version number to the new version.
3. Create a PR to merge develop into trunk and wait till github CI finishes successfully.
4. Include the following line as a first line on the PR description Release Version: xxx and replace xxx with the new version number.
5. Then add the label release-alpha to that PR and wait till the alpha release workflow finishes.
6. Check the github releases page, you will find a new release is created there with the same PR content.

Technical documentation

All mentioned above.

Type of change

Delete options that are not relevant.

• New feature (non-breaking change which adds functionality).

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 21b4dd81	✅ ∅ (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (21b4dd8)	Report Missing	Report Missing	Report Missing
Head commit (4c0ef01)	37973	16615	43.75%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#6538)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

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