chore: relaxed biome dependency constraint and removed hardcoded schema version

- Updated @biomejs/biome dependency from ^2.4.2 to ^2 for broader version compatibility.
- Removed hardcoded schema version reference from biome.json to allow automatic schema resolution.

biome.json

@@ -1,5 +1,4 @@
 {
-	"$schema": "https://biomejs.dev/schemas/2.4.2/schema.json",
 	"linter": {
 		"enabled": true,
 		"rules": {

bun.lock

@@ -8,7 +8,7 @@
         "@sinclair/typebox": "0.34.48",
       },
       "devDependencies": {
-        "@biomejs/biome": "^2.4.2",
+        "@biomejs/biome": "^2",
         "@bufbuild/protoc-gen-es": "^2.11.0",
         "@types/bun": "^1.3.9",
         "@typescript/native-preview": "^7.0.0-dev.20260215.1",

package.json

@@ -39,7 +39,7 @@
 		"generate-docs-index": "bun --cwd=packages/coding-agent run generate-docs-index"
 	},
 	"devDependencies": {
-		"@biomejs/biome": "^2.4.2",
+		"@biomejs/biome": "^2",
 		"@bufbuild/protoc-gen-es": "^2.11.0",
 		"@types/bun": "^1.3.9",
 		"@typescript/native-preview": "^7.0.0-dev.20260215.1",