feat: Enhance CLI output handling with structured Intermediate Representation (IR)

- Introduced `CliOutputUnit` and `IOutputParser` interfaces for unified output processing.
- Implemented `PlainTextParser` and `JsonLinesParser` for parsing raw CLI output into structured units.
- Updated `executeCliTool` to utilize output parsers and handle structured output.
- Added `flattenOutputUnits` utility for extracting clean output from structured data.
- Enhanced `ConversationTurn` and `ExecutionRecord` interfaces to include structured output.
- Created comprehensive documentation for CLI Output Converter usage and integration.
- Improved error handling and type mapping for various output formats.

ccw/src/tools/cli-history-store.ts

@@ -8,6 +8,7 @@ import { existsSync, mkdirSync, readdirSync, readFileSync, statSync, unlinkSync,
 import { join } from 'path';
 import { parseSessionFile, formatConversation, extractConversationPairs, type ParsedSession, type ParsedTurn } from './session-content-parser.js';
 import { StoragePaths, ensureStorageDir, getProjectId } from '../config/storage-paths.js';
+import type { CliOutputUnit } from './cli-output-converter.js';
 
 // Types
 export interface ConversationTurn {
@@ -26,6 +27,7 @@ export interface ConversationTurn {
     cached?: boolean;
     stdout_full?: string;
     stderr_full?: string;
+    structured?: CliOutputUnit[];  // Structured IR sequence for advanced parsing
   };
 }