feat(coding-agent/discovery): added OpenCode discovery provider with config loading and MCP/skills/commands support

- Added OpenCode discovery provider that loads configuration from ~/.config/opencode/ and .opencode/ directories.
- Added support for loading MCP servers from opencode.json mcp key with stdio and HTTP transport types.
- Added support for loading skills from ~/.config/opencode/skills/ and .opencode/skills/ directories.
- Added support for loading slash commands from ~/.config/opencode/commands/ and .opencode/commands/ directories with frontmatter parsing.
- Added support for loading extension modules (plugins) from ~/.config/opencode/plugins/ and .opencode/plugins/ directories.
- Added support for loading context files (AGENTS.md) and settings from OpenCode configuration.

package.json

@@ -37,7 +37,7 @@
 		"generate-models": "bun --cwd=packages/ai scripts/generate-models.ts"
 	},
 	"devDependencies": {
-		"@biomejs/biome": "^2.4.0",
+		"@biomejs/biome": "^2.4.2",
 		"@bufbuild/protoc-gen-es": "^2.11.0",
 		"@types/bun": "^1.3.9",
 		"@typescript/native-preview": "^7.0.0-dev.20260215.1",