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>

src/constants/commands.js

@@ -0,0 +1,17 @@
+/**
+ * Command related constants
+ * Defines which commands trigger AI processing
+ */
+
+// Command names that trigger AI processing
+export const AI_COMMAND_NAMES = [
+	'add-task',
+	'analyze-complexity',
+	'expand-task',
+	'parse-prd',
+	'research',
+	'research-save',
+	'update-subtask',
+	'update-task',
+	'update-tasks'
+];