feat: add templates for architecture documents, epics, product briefs, and requirements PRD

- Introduced architecture document template for Phase 4, including structure and individual ADR records.
- Added epics & stories template for Phase 5, detailing epic breakdown and dependencies.
- Created product brief template for Phase 2, summarizing product vision, problem statement, and target users.
- Developed requirements PRD template for Phase 3, outlining functional and non-functional requirements with traceability.
- Implemented spec command for project spec management with subcommands for loading, listing, rebuilding, and initializing specs.

ccw/src/cli.ts

@@ -12,6 +12,7 @@ import { cliCommand } from './commands/cli.js';
 import { memoryCommand } from './commands/memory.js';
 import { coreMemoryCommand } from './commands/core-memory.js';
 import { hookCommand } from './commands/hook.js';
+import { specCommand } from './commands/spec.js';
 import { issueCommand } from './commands/issue.js';
 import { workflowCommand } from './commands/workflow.js';
 import { loopCommand } from './commands/loop.js';
@@ -297,6 +298,16 @@ export function run(argv: string[]): void {
     .option('--limit <n>', 'Max entries to return (for project-state)')
     .action((subcommand, args, options) => hookCommand(subcommand, args, options));
 
+  // Spec command - Project spec management (load/list/rebuild/status/init)
+  program
+    .command('spec [subcommand] [args...]')
+    .description('Project spec management for conventions and guidelines')
+    .option('--dimension <dim>', 'Target dimension: specs, roadmap, changelog, personal')
+    .option('--context <text>', 'Context text for keyword extraction (CLI mode)')
+    .option('--stdin', 'Read input from stdin (Hook mode)')
+    .option('--json', 'Output as JSON')
+    .action((subcommand, args, options) => specCommand(subcommand, args, options));
+
   // Issue command - Issue lifecycle management with JSONL task tracking
   program
     .command('issue [subcommand] [args...]')