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-local-embeddings.ts

@@ -19,6 +19,7 @@ export interface ManagedLocalEmbeddingsDaemon {
 
 export interface ManagedLocalEmbeddingsOptions {
   cliVersion: string;
+  projectDir: string;
   installPolicy: KtxManagedPythonInstallPolicy;
   io: KtxCliIo;
   ensureRuntime?: (options: {
@@ -29,6 +30,7 @@ export interface ManagedLocalEmbeddingsOptions {
   }) => Promise<ManagedPythonCommandRuntime>;
   startDaemon?: (options: {
     cliVersion: string;
+    projectDir: string;
     features: ['local-embeddings'];
     force: boolean;
   }) => Promise<ManagedPythonDaemonStartResult>;
@@ -79,6 +81,7 @@ export async function ensureManagedLocalEmbeddingsDaemon(
   });
   const daemon = await startDaemon({
     cliVersion: options.cliVersion,
+    projectDir: options.projectDir,
     features: ['local-embeddings'],
     force: false,
   });