Reduce painful shellscripts in GitHub action workflows

[kachick]

Problem

#903 (comment) and I did painful experience in past. For example #473

ref: kachick/times_kachick#204 (comment),

How

• Prefer another shell for that place # Introduce nushell again to avoid much slow pwsh #819
• Extract shellscripts from YAML => Making it hard to handle variable and workflow templates?
• Rewrite shellscript with golang # シェルスクリプトの管理が辛いから、堅めでどこでも動かしやすくて足回りが重たくない言語で書き換えたい #183, Replace shellscirpt with ...? #825
• Rewrite shellscript with ruby. Ruby is in GitHub hosted runner and pipeline_w is useful as bash # 20af32e
• Or TypeScript # Experimenral rewrite gen_matrix.go with typescript and deno #875
• Or JavaScript # https://github.com/actions/github-script, https://t28.dev/blog/write-github-actions-step-with-zx-in-custom-shell

[kachick]

Ruby

https://github.com/search?q=path%3A.github%2Fworkflows%20lang%3Ayaml%20%22shell%3A%20ruby%22&type=code

Looks like someone using with --disable=gems or -ryaml

[kachick]

Keep bash but makes it better than now

github/vscode-github-actions#114 (comment)
github/vscode-github-actions#65 (comment)

redhat-developer/vscode-yaml#943

why not actionlint: https://github.com/kachick/wait-other-jobs/blob/c2ce8ba5be1b7f8280013582bbe2ac908fdb35c9/flake.nix#L54-L55

https://github.com/harrydowning/vscode-yaml-embedded-languages#readme is good, but helix highlight as it without any suffix by default 😮 (However hx does not detect another language as powershell. harrydowning/vscode-yaml-embedded-languages#27)

github/vscode-github-actions#266

harrydowning/vscode-yaml-embedded-languages#32 => shell makes this, ruby does not make

[kachick]

I may use nu in next fight. However I don't have motivation to rewrite existing stable code.