feat(theme): extract TUI theme package (#39378)

packages/theme/package.json

@@ -0,0 +1,36 @@
+{
+  "$schema": "https://json.schemastore.org/package.json",
+  "name": "@opencode-ai/theme",
+  "version": "0.0.0",
+  "type": "module",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/anomalyco/opencode.git",
+    "directory": "packages/theme"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "files": [
+    "dist"
+  ],
+  "exports": {
+    "./tui": "./src/tui/index.ts",
+    "./tui/v1": "./src/tui/v1.ts"
+  },
+  "scripts": {
+    "build": "bun run script/build.ts",
+    "typecheck": "tsgo --noEmit"
+  },
+  "dependencies": {
+    "@opentui/core": "catalog:",
+    "effect": "catalog:"
+  },
+  "devDependencies": {
+    "@tsconfig/bun": "catalog:",
+    "@types/bun": "catalog:",
+    "@typescript/native-preview": "catalog:",
+    "typescript": "catalog:"
+  }
+}