ci: basic pr auto labeler (#55736)

* ci: basic pr auto labeler

ci: basic pr auto labeler

Intended to automate what is otherwise a boring task for
maintainers, this uses basic glob matching to apply labels to prs

Not finished it's just the basics to get this boy rolling, it needs more
patters, probably the company of a smarter workflow based on something
else, maybe some colors, cover all mods (I'll let you do that mod
maintainers ;))

Contributes to #55729

* make patters more general
more general is better in this case, select major categories based on
file extensions

.github/labeler.yml

@@ -0,0 +1,51 @@
+"C++":
+  - "**/*.cpp"
+  - "**/*.h"
+
+"Json":
+  - "**/*.json"
+
+"Python":
+  - "**/*.py"
+
+"Documentation":
+  - "**/*.md"
+  - doc/**/*
+
+"Code: Tooling":
+  - tools/**/*
+
+"Code: Test":
+  - tests/**/*
+
+"SDL: Tiles / Sound":
+  - gfx/**/*
+  - sound/**/*
+
+"Translation":
+  - lang/**/*
+
+"Mods: Aftershock":
+  - data/mods/Aftershock/**/*
+  - data/mods/aftershock_exoplanet/**/*
+
+"Mods: Dark Days of the Dead":
+  - data/mods/classic_zombies/**/*
+
+"Mods: Dark Skies":
+  - data/mods/Dark-Skies-Above/**/*
+
+"Mods: Dinoclysm":
+  - data/mods/DinoMod/**/*
+
+"Mods: Generic Guns":
+  - data/mods/Generic_Guns/**/*
+
+"Mods: MMA":
+  - data/mods/MMA/**/*
+
+"Mods: Magiclysm":
+  - data/mods/Magiclysm/**/*
+
+"Mods: No Hope":
+  - data/mods/No_Hope/**/*

.github/workflows/labeler.yml

@@ -0,0 +1,12 @@
+name: "Pull Request Labeler"
+on:
+  - pull_request_target
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v3
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"
+        sync-labels: true