Feat: Implemented advanced settings for Claude Code AI provider (#872)

* Feat: Implemented advanced settings for Claude Code AI provider

- Added new 'claudeCode' property to default config
- Added getters and validation functions to 'config-manager.js'
- Added new 'isEmpty' utility to 'utils.js'
- Added new constants file 'commands.js' for AI_COMMAND_NAMES
- Updated Claude Code AI provider to use new config functions
- Updated 'claude-code-usage.md' documentation
- Added 'config-manager.test.js' tests to cover new settings

* chore: run format

---------

Co-authored-by: Ralph Khreish <35776126+Crunchyman-ralph@users.noreply.github.com>

.taskmaster/config.json

@@ -31,5 +31,6 @@
 		"azureBaseURL": "https://your-endpoint.azure.com/",
 		"defaultTag": "master",
 		"responseLanguage": "English"
-	}
+	},
+	"claudeCode": {}
 }