Set up project scaffold: Bun/OpenCode plugin with registry pattern

- AGENTS.md adapted from taskgraph for this Bun/TypeScript plugin
- Dual MIT/Apache-2.0 licenses
- Package.json, tsconfig, biome config following open-memory pattern
- Skeleton src/ with registry-pattern tasks tool (help operation working)
- Opencode.json plugin config
- .gitignore for dist, node_modules, lockb
- Remove typo .gitingore files, proper .gitignore in .opencode/

tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ES2022",
+    "moduleResolution": "Bundler",
+    "types": ["node", "bun"],
+    "strict": true,
+    "noEmitOnError": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "verbatimModuleSyntax": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["src"]
+}