lookup for generated files: support file names used by automake

[GitMensch]

automake uses uses a set of different extensions and "basename" files, see Automake manual, Yacc and Lex support and executes the yacc/lex programs with ylwrap to produce this result

Type of change

• Bug fix
• New feature
• Refactor / internal improvement
• Docs / config only

What does this PR do?

• adds automake supported extensions to Bison recognition pattern
• adds the generated filenames (basename + x) in the candidates (if that feels like "too much", then we need a two-step approach)
• if not found in default directories uses a two-step approach to find the generated files somewhere in the workspace

Additional: enables a manual action run in any branch (I can split that from this PR, and I think the CI should possibly run in any branch on commit/push, no?)

Related issue

missing piece for #27

How to test manually

use an automake project like GnuCOBOL, from a release tarball (in which case bison/flex generated files won't even be re-generated, so no configure/make needed)

Checklist

• npm run compile passes with no new errors -> as seen in CI
• Tests added or updated (npx ts-node ...) -> not planned, but sounds possible
• Manual test done in VS Code --> done with the CI generated vsix (works as long as source and generated are in the same folder)
• CHANGELOG.md updated --> explicit not done as the feature is already described, but could be added
• No unintended files staged (node_modules, .env, dist...)

[GitMensch]

oh no, not even a squash merge, so I'm now forever doomed to be documented to checked in a bunch of intermediate versions ;-) [that was one of the reasons to mark it as a draft (and may still be adjusted when merging to main), the second part is that I can't get the "build folder" part to work, see https://github.com//issues/27#issuecomment-4260029735]

[theodevelop]

Oh no, I didn't notice it was still a draft! I thought there were just a few things to fix, which I did in fix/issue-27 — sorry about that, I'll be more careful next time. Everything will be available in the next release!