chore(ci): define Github labels as code with a workflow

- exact same labels as existing ones
- allow for future tracked modifications of labels
- labels workflow dry-runs on PRs

Author: qdm12

.github/labels.yml

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+# Lifecycle labels
+- name: "DO NOT MERGE"
+  color: "ba1b48"
+  description: "This PR must not be merged in its current state"
+- name: "lifecycle/frozen"
+  color: "2476B2"
+- name: "lifecycle/stale"
+  color: "ededed"
+
+# General category labels
+- name: "bug"
+  color: "d73a4a"
+  description: "Something isn't working"
+- name: "documentation"
+  color: "0075ca"
+  description: "Improvements or additions to documentation or examples"
+- name: "enhancement"
+  color: "a2eeef"
+  description: "New feature or request"
+- name: "needs information"
+  color: "d876e3"
+  description: "Further information is needed"
+- name: "needs investigation"
+  color: "147F45"
+  description: "It is currently unclear if there is an issue"
+- name: "good first issue"
+  color: "7057ff"
+  description: "Good for newcomers"
+- name: "help wanted"
+  color: "008672"
+  description: "Looking for someone to address this"
+- name: "ci"
+  color: "e99695"
+  description: "This focuses on changes to the CI process"
+- name: "cleanup"
+  color: "BFD4F2"
+  description: "Code quality improvement"
+- name: "dependencies"
+  color: "0366d6"
+  description: "This primarily focuses on changing a dependency"
+- name: "testing"
+  color: "220233"
+  description: "This primarily focuses on testing"
+- name: "monitoring"
+  color: "97450A"
+  description: "This primarily focuses on logs, metrics, and/or tracing"
+- name: "incident response"
+  color: "BE3D15"
+- name: "github_actions"
+  color: "000000"
+  description: "Pull requests that update GitHub Actions code"
+- name: "go"
+  color: "16e2e2"
+  description: "Pull requests that update Go code"
+
+# Avalanchego specific labels
+- name: "antithesis"
+  color: "1d76db"
+  description: "Related to an issue reported by Antithesis"
+- name: "bubble votes"
+  color: "3C9CDD"
+- name: "consensus"
+  color: "4444ff"
+  description: "This involves consensus"
+- name: "continuous staking"
+  color: "f9d0c4"
+- name: "Durango"
+  color: "DAF894"
+  description: "durango fork"
+- name: "gossiping upgrade"
+  color: "c2e0c6"
+- name: "merkledb"
+  color: "0e8a16"
+- name: "networking"
+  color: "88E841"
+  description: "This involves networking"
+- name: "sdk"
+  color: "72ED25"
+  description: "This involves SDK tooling or frameworks"
+- name: "storage"
+  color: "3F2A70"
+  description: "This involves storage primitives"
+- name: "Uptime Tracking"
+  color: "d4c5f9"
+- name: "vm"
+  color: "d1f7a0"
+  description: "This involves virtual machines"
+- name: "warp"
+  color: "4FC611"
+- name: "Warp Signature API"
+  color: "68A7EA"
+
+# ACP labels
+- name: "acp103"
+  color: "AB2C58"
+- name: "acp113"
+  color: "3359BA"
+- name: "acp118"
+  color: "DFC715"
+- name: "acp125"
+  color: "bfdadc"
+- name: "acp20"
+  color: "DB7D37"
+- name: "acp77"
+  color: "45CDF2"

.github/workflows/labels.yml

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+name: labels
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - .github/labels.yml
+      - .github/workflows/labels.yml
+  pull_request: # dry run only
+    paths:
+      - .github/labels.yml
+      - .github/workflows/labels.yml
+
+jobs:
+  labeler:
+    permissions:
+      contents: read
+      issues: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: crazy-max/ghaction-github-labeler@v5
+        with:
+          dry-run: ${{ github.event_name == 'pull_request' }}