Re-add PR labeling/triage workflow

.github/labeler.yml

@@ -0,0 +1,35 @@
+audio:
+- changed-files:
+  - any-glob-to-any-file: 'src/Ryujinx.Audio*/**'
+
+cpu:
+- changed-files:
+  - any-glob-to-any-file: ['src/ARMeilleure/**', 'src/Ryujinx.Cpu/**', 'src/Ryujinx.Memory/**']
+
+gpu:
+- changed-files:
+  - any-glob-to-any-file: ['src/Ryujinx.Graphics.*/**', 'src/Spv.Generator/**', 'src/Ryujinx.ShaderTools/**']
+
+'graphics-backend:opengl':
+- changed-files:
+  - any-glob-to-any-file: 'src/Ryujinx.Graphics.OpenGL/**'
+
+'graphics-backend:vulkan':
+- changed-files:
+  - any-glob-to-any-file: ['src/Ryujinx.Graphics.Vulkan/**', 'src/Spv.Generator/**']
+
+gui:
+- changed-files:
+  - any-glob-to-any-file: ['src/Ryujinx/**', 'src/Ryujinx.UI.Common/**', 'src/Ryujinx.UI.LocaleGenerator/**', 'src/Ryujinx.Gtk3/**']
+
+horizon:
+- changed-files:
+  - any-glob-to-any-file: ['src/Ryujinx.HLE/**', 'src/Ryujinx.Horizon/**']
+
+kernel:
+- changed-files:
+  - any-glob-to-any-file: 'src/Ryujinx.HLE/HOS/Kernel/**'
+
+infra:
+- changed-files:
+  - any-glob-to-any-file: ['.github/**', 'distribution/**', 'Directory.Packages.props']

.github/workflows/pr_triage.yml

@@ -0,0 +1,27 @@
+name: "Pull Request Triage"
+on:
+  pull_request_target:
+    types: [opened, ready_for_review]
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+      - name: Fetch labeler.yml
+        uses: actions/checkout@v4
+        with:
+           # Ensure we pin the source origin as pull_request_target run under forks.
+           fetch-depth: 0
+           repository: ryujinx-mirror/ryujinx
+           ref: mirror/master
+
+      - name: Update labels based on changes in PR
+        uses: actions/labeler@v5
+        with:
+          sync-labels: true
+          dot: true