Create triage_pr.yml

.github/labeler.yml

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+# Documentation - https://github.com/actions/labeler
+
+'RSX':
+  - 'rpcs3/Emu/RSX/*'
+'CPU':
+  - '**SPU*'
+  - '**PPU*'
+  - '**MFC*'
+'Overlays':
+  - '**/RSX/Overlays/*'
+'Network':
+  - '**sys_net/*'
+  - '**sys_net.cpp'
+  - '**sys_net.h'
+  - 'RPCS3/Emu/NP/*'
+'Input':
+  - '**/Input/*'
+'GUI':
+  - 'rpcs3/rpcs3qt/*'
+  - 'rpcs3/qt/*'
+'Firmware: HLE':
+  - 'rpcs3/Emu/Cell/Modules/*'

.github/workflows/triage_pr.yml

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+# Runs steps to triage an incoming Pull Request, for example - applying labels.
+name: Pull Request Triage
+
+on: [pull_request_target]
+
+jobs:
+  label:
+    if: github.repository == 'RPCS3/rpcs3'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+    - uses: actions/labeler@v4
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"