refactor(fs): migrated remaining sync file operations to async

- Converted readdirSync, readFileSync, and statSync to async readdir, readFile, stat across skills and agent discovery.
- Made scanDirectoryForSkills async and refactored custom directory scanning to use Promise.all for concurrent processing.
- Updated agent discovery to use fs/promises for async file reading and refactored helper patterns.
- Added AgentParsingError exception class for better error handling during agent parsing.
- Added filesystem error type guards (isEnoent, isEacces, isPerm, etc.) to pi-utils for safe error checking.
- Added color manipulation utilities to pi-utils for accessibility features.
- Added color-blind mode setting to settings manager.
- Migrated plugins, settings, and config modules from sync to async file operations.
- Updated error handling to use new pi-utils type guards for type-safe checking.

packages/coding-agent/package.json

@@ -80,29 +80,29 @@
 		"@oh-my-pi/pi-ai": "workspace:*",
 		"@oh-my-pi/pi-tui": "workspace:*",
 		"@oh-my-pi/pi-utils": "workspace:*",
-		"@openai/agents": "^0.3.7",
+		"@openai/agents": "^0.4.3",
 		"@sinclair/typebox": "^0.34.46",
 		"ajv": "^8.17.1",
 		"chalk": "^5.5.0",
 		"cli-highlight": "^2.1.11",
 		"diff": "^8.0.2",
 		"file-type": "^21.1.1",
-		"glob": "^11.0.3",
+		"glob": "^13.0.0",
 		"handlebars": "^4.7.8",
 		"highlight.js": "^11.11.1",
-		"marked": "^15.0.12",
+		"marked": "^17.0.1",
 		"nanoid": "^5.1.6",
 		"ndjson": "^2.0.0",
-		"node-html-parser": "^6.1.13",
+		"node-html-parser": "^7.0.2",
 		"smol-toml": "^1.6.0",
 		"strip-ansi": "^7.1.2",
 		"zod": "^4.3.5"
 	},
 	"devDependencies": {
-		"@types/diff": "^7.0.2",
+		"@types/diff": "^8.0.0",
 		"@types/ms": "^2.1.0",
 		"@types/ndjson": "^2.0.4",
-		"@types/node": "^24.3.0",
+		"@types/node": "^25.0.10",
 		"ms": "^2.1.3"
 	},
 	"keywords": [