restore: recover deleted documentation, CI/CD, and infrastructure files

Restored from origin/main (b4663fb):
- .github/ workflows and issue templates
- .gitignore (proper exclusions)
- .opencode/agent/web_developer.md
- AGENTS.md, BUILD.md, PROGRESS.md
- dev-docs/ (9 architecture/implementation docs)
- docs/screenshots/ (4 UI screenshots)
- images/ (CodeNomad icons)
- package-lock.json (dependency lockfile)
- tasks/ (25+ project task files)

Also restored original source files that were modified:
- packages/ui/src/App.tsx
- packages/ui/src/lib/logger.ts
- packages/ui/src/stores/instances.ts
- packages/server/src/server/routes/workspaces.ts
- packages/server/src/workspaces/manager.ts
- packages/server/src/workspaces/runtime.ts
- packages/server/package.json

Kept new additions:
- Install-*.bat/.sh (enhanced installers)
- Launch-*.bat/.sh (new launchers)
- README.md (SEO optimized with GLM 4.7)

packages/server/src/server/routes/workspaces.ts

@@ -35,16 +35,10 @@ export function registerWorkspaceRoutes(app: FastifyInstance, deps: RouteDeps) {
   })
 
   app.post("/api/workspaces", async (request, reply) => {
-    try {
-      const body = WorkspaceCreateSchema.parse(request.body ?? {})
-      const workspace = await deps.workspaceManager.create(body.path, body.name)
-      reply.code(201)
-      return workspace
-    } catch (error) {
-      request.log.error({ err: error }, "Failed to create workspace")
-      const message = error instanceof Error ? error.message : "Failed to create workspace"
-      reply.code(400).type("text/plain").send(message)
-    }
+    const body = WorkspaceCreateSchema.parse(request.body ?? {})
+    const workspace = await deps.workspaceManager.create(body.path, body.name)
+    reply.code(201)
+    return workspace
   })
 
   app.get<{ Params: { id: string } }>("/api/workspaces/:id", async (request, reply) => {