Add pr labeler workflow (open-telemetry#4313)

.github/component-label-map.yml

@@ -0,0 +1,76 @@
+blog:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/blog/**
+sig:cpp:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/cpp/**
+sig:erlang:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/erlang/**
+sig:go:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/go/**
+sig:java:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/java/**
+sig:js:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/js/**
+sig:dotnet:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/net/**
+sig:php:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/php/**
+sig:python:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/python/**
+sig:ruby:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/ruby/**
+sig:rust:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/rust/**
+sig:swift:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/languages/swift/**
+sig:operator:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/kubernetes/operator/**
+sig:helm:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/kubernetes/helm/**
+sig:security:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/security/**
+sig:demo:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/demo/**
+sig:collector:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/collector/**
+sig:enduser:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/community/end-user/**
+sig:spec:
+  - changed-files:
+      - any-glob-to-any-file:
+          - content/en/docs/specs/**

.github/workflows/label-prs.yml

@@ -0,0 +1,16 @@
+name: 'Label PR'
+on:
+  - pull_request_target
+
+jobs:
+  labeler:
+    name: 'Add component labels'
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/labeler@v5
+        with:
+          configuration-path: '.github/component-label-map.yml'