Initial: MPQ patch packager (Gitea Action, StormLib-based)

A BigWigs-style CI packager for WoW MPQ patch archives. Reads an mpq.yaml
manifest, stages files, builds a vanilla-1.12-compatible patch-X.mpq via
StormLib, and (in the example workflow) attaches it to a Gitea release on tag.

examples/gluexml.mpq.yaml

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+# Example manifest for the GlueXML repo. Copy this to the repo root as
+# `mpq.yaml`. It packs the whole repo into Interface\GlueXML\ inside a
+# patch-Z.mpq (Z sorts after Blizzard's stock MPQs, so its files win on conflict).
+
+name: GlueXML
+patch-letter: Z
+
+substitute:
+  enabled: true
+  extensions: [".lua", ".xml", ".toc"]
+
+contents:
+  - src: .
+    dest: Interface/GlueXML
+    ignore:
+      - ".git/**"
+      - ".gitea/**"
+      - "mpq.yaml"
+      - "*.md"
+      - "dist/**"

examples/release.yml

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+# Example consuming workflow. Drop this in a WoW interface repo (e.g. GlueXML)
+# at .gitea/workflows/release.yml. Pushing a tag like `v1.0.0` builds the MPQ
+# and attaches it to a matching Gitea release.
+#
+# Requires: Actions enabled on the repo, and a runner advertising `ubuntu-latest`
+# (or change runs-on to a label your act_runner registers).
+
+name: Release MPQ
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  package:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build patch MPQ
+        id: pack
+        uses: paste/mpq-packager@v1
+        with:
+          manifest: mpq.yaml
+          version: ${{ github.ref_name }}
+
+      - name: Create release and upload asset
+        env:
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          API="${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}"
+          TAG="${GITHUB_REF_NAME}"
+          MPQ="${{ steps.pack.outputs.mpq-path }}"
+          NAME="${{ steps.pack.outputs.mpq-name }}"
+
+          echo "Creating release $TAG"
+          RID=$(curl -fsSL -X POST "$API/releases" \
+            -H "Authorization: token $TOKEN" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\":\"$TAG\",\"name\":\"$TAG\",\"draft\":false,\"prerelease\":false}" \
+            | python3 -c 'import sys,json; print(json.load(sys.stdin)["id"])')
+
+          echo "Uploading $NAME to release $RID"
+          curl -fsSL -X POST "$API/releases/$RID/assets?name=$NAME" \
+            -H "Authorization: token $TOKEN" \
+            -H "Content-Type: application/octet-stream" \
+            --data-binary "@$MPQ"
+          echo "Done."