feat(mosaic): merge @mosaic/cli into @mosaic/mosaic

@mosaic/mosaic is now the single package providing both:
- 'mosaic' binary (CLI: yolo, coord, prdy, tui, gateway, etc.)
- 'mosaic-wizard' binary (installation wizard)

Changes:
- Move packages/cli/src/* into packages/mosaic/src/
- Convert dynamic @mosaic/mosaic imports to static relative imports
- Add CLI deps (ink, react, socket.io-client, @mosaic/config) to mosaic
- Add jsx: react-jsx to mosaic's tsconfig
- Exclude packages/cli from workspace (pnpm-workspace.yaml)
- Update install.sh to install @mosaic/mosaic instead of @mosaic/cli
- Bump version to 0.0.17

This eliminates the circular dependency between @mosaic/cli and
@mosaic/mosaic that was blocking the build graph.

packages/mosaic/src/commands/prdy.ts

@@ -0,0 +1,55 @@
+import type { Command } from 'commander';
+import { withAuth } from './with-auth.js';
+import { fetchProjects } from '../tui/gateway-api.js';
+
+export function registerPrdyCommand(program: Command) {
+  const cmd = program
+    .command('prdy')
+    .description('PRD wizard — create and manage Product Requirement Documents')
+    .option('-g, --gateway <url>', 'Gateway URL', 'http://localhost:14242')
+    .option('--init [name]', 'Create a new PRD')
+    .option('--update [name]', 'Update an existing PRD')
+    .option('--project <idOrName>', 'Scope to project')
+    .action(
+      async (opts: {
+        gateway: string;
+        init?: string | boolean;
+        update?: string | boolean;
+        project?: string;
+      }) => {
+        // Detect project context when --project flag is provided
+        if (opts.project) {
+          try {
+            const auth = await withAuth(opts.gateway);
+            const projects = await fetchProjects(auth.gateway, auth.cookie);
+            const match = projects.find((p) => p.id === opts.project || p.name === opts.project);
+            if (match) {
+              console.log(`Project context: ${match.name} (${match.id})\n`);
+            }
+          } catch {
+            // Gateway not available — proceed without project context
+          }
+        }
+
+        try {
+          const { runPrdWizard } = await import('@mosaic/prdy');
+          const name =
+            typeof opts.init === 'string'
+              ? opts.init
+              : typeof opts.update === 'string'
+                ? opts.update
+                : 'untitled';
+          await runPrdWizard({
+            name,
+            projectPath: process.cwd(),
+            interactive: true,
+          });
+        } catch (err) {
+          console.error(`PRD wizard failed: ${err instanceof Error ? err.message : String(err)}`);
+          process.exit(1);
+        }
+      },
+    );
+
+  return cmd;
+}