feat(cli): friendly missing-project status and per-project daemon state (#87)

- Block project-aware commands when ktx.yaml is absent and render a
  friendly "run ktx setup" message (plain or JSON) instead of leaking
  ENOENT or "Project: ..." noise.
- Make ktx status project detect the missing config and emit the same
  message via a shared renderMissingProjectMessage helper.
- Move the managed Python daemon state, stdout, and stderr files out of
  the shared runtime root into {projectDir}/.ktx/runtime so multiple
  projects no longer share a single daemon record.
- Simplify the runtime install root to ~/.ktx/runtime on every platform
  and split the daemon-specific paths into managedPythonDaemonLayout,
  threading projectDir through start, stop, and stop-all paths.

packages/cli/src/managed-python-command.test.ts

@@ -45,9 +45,6 @@ function layout(): ManagedPythonRuntimeLayout {
     assetManifestPath: '/assets/python/manifest.json',
     pythonPath: '/runtime/0.2.0/.venv/bin/python',
     daemonPath: '/runtime/0.2.0/.venv/bin/ktx-daemon',
-    daemonStatePath: '/runtime/0.2.0/daemon.json',
-    daemonStdoutPath: '/runtime/0.2.0/daemon.stdout.log',
-    daemonStderrPath: '/runtime/0.2.0/daemon.stderr.log',
   };
 }