feat: Add context_cache MCP tool with simplified CLI options

Add context_cache MCP tool for caching files by @patterns:
- pattern-parser.ts: Parse @expressions using glob
- context-cache-store.ts: In-memory cache with TTL/LRU
- context-cache.ts: MCP tool with pack/read/status/release/cleanup

Simplify CLI cache options:
- --cache now uses comma-separated format instead of JSON
- Items starting with @ are patterns, others are text content
- Add --inject-mode option (none/full/progressive)
- Default: codex=full, gemini/qwen=none

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ccw/src/cli.ts

@@ -181,12 +181,14 @@ export function run(argv: string[]): void {
     .option('--resume [id]', 'Resume previous session (empty=last, or execution ID, or comma-separated IDs for merge)')
     .option('--id <id>', 'Custom execution ID (e.g., IMPL-001-step1)')
     .option('--no-native', 'Force prompt concatenation instead of native resume')
+    .option('--cache [items]', 'Cache: comma-separated @patterns and text content')
+    .option('--inject-mode <mode>', 'Inject mode: none, full, progressive (default: codex=full, others=none)')
     // Storage options
     .option('--project <path>', 'Project path for storage operations')
     .option('--force', 'Confirm destructive operations')
     .option('--cli-history', 'Target CLI history storage')
     .option('--memory', 'Target memory storage')
-    .option('--cache', 'Target cache storage')
+    .option('--storage-cache', 'Target cache storage')
     .option('--config', 'Target config storage')
     .action((subcommand, args, options) => cliCommand(subcommand, args, options));