Switch to pnpm (#35274)

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: silverwind <me@silverwind.io>

tools/.pnpmrc

@@ -0,0 +1,2 @@
+enable-pre-post-scripts=true
+ignored-build-dependencies=[]

tools/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "gitea-tools",
+  "version": "1.0.0",
+  "description": "Build tools for Gitea",
+  "type": "module",
+  "private": true,
+  "dependencies": {
+    "fabric": "^6.0.0",
+    "imagemin-zopfli": "^7.0.0",
+    "svgo": "^3.0.0",
+    "fast-glob": "^3.0.0"
+  },
+  "optionalDependencies": {
+    "canvas": "^3.2.0"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": ["canvas", "zopflipng-bin"],
+    "overrides": {
+      "canvas": "3.2.0"
+    }
+  }
+}