feat(ci): autolabel pull requests (#14574)

autolabel pull requests depending on which files are modified

.github/labeler.yml

@@ -0,0 +1,41 @@
+"lsp":
+  - runtime/lua/vim/lsp.lua
+  - runtime/lua/vim/lsp/*
+
+"lua":
+  - runtime/lua/**/*
+  - src/nvim/lua
+
+"tui":
+  - src/nvim/tui/tui.*
+
+"tree-sitter":
+  - src/nvim/lua/treesitter.*
+  - runtime/lua/vim/treesitter.lua
+  - runtime/lua/vim/treesitter/*
+
+"topic: spell":
+  - src/nvim/spell*
+
+"topic: :terminal":
+  - src/nvim/terminal.*
+
+"topic: column":
+  - src/nvim/mark.h
+  - src/nvim/mark.c
+  - src/nvim/sign*
+
+"topic: folds":
+  - src/nvim/fold*
+
+"topic: mouse":
+  - src/nvim/mouse*
+
+"topic: documentation":
+  - runtime/doc/*
+
+"topic: clipboard":
+  - runtime/autoload/provider/clipboard.vim
+
+"topic: diff":
+  - src/nvim/diff.*

.github/workflows/labeler.yml

@@ -0,0 +1,13 @@
+name: "Pull Request Labeler"
+on:
+- pull_request_target
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+    - uses: actions/labeler@main
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"