feat: Introduce llms.txt file and script for creating it

Author: zeljkoX

package.json

@@ -14,6 +14,7 @@
 		"lint:fix": "biome lint --write src/",
 		"format": "biome format src/",
 		"format:fix": "biome format --write src/",
+		"generate:llms-txt": "tsx scripts/generate-llms-txt.ts",
 		"check": "biome check src/ && pnpm run lint:links",
 		"check:fix": "biome check --write src/"
 	},