GHA

[wipe2238]

Various additions/tweaks/improvements related to repository Actions. Updated from time to time to not forget about something.

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• [x] add lexx-friendly way to manually trigger worflows while there is dispatch.sh already, it runs under bash, so yeah... ~~making same thing as .exe can be fun little project to refresh memory how to work with REST APIs in C#~~

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• [x] sfall compilation as part of daily updates i'm removing AppVeyor installs from all organization repos soon, so whole setup has to be ported to Actions at some point
• [x] playerify documentation package should be released with all README.md files renamed to README.txt and tweaked a little to get rid of some markdown/html syntax
  • [path](path) -> path
  • get rid of html ~~used for images?~~
• [x] disable sfall debug messages when creating release package
• [x] when creating draft release, use NEWS.md as default text
• ~~when creating draft release, previous draft should be removed~~
• [x] convert all repository_dispatch scenarios to workflow_dispatch
• [x] remove repository_dispatch triggers

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• [x] https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/
• [x] investigate newlines issue when creating release notes
• [ ] automate filenames normalization has to wait until fo1_LANG branches are merged into master (especially fo1_french)
• [ ] workflow_call https://github.blog/changelog/2021-10-05-github-actions-dry-your-github-actions-configuration-by-reusing-workflows/
• [ ] split schedule into multiple jobs