feat(KB-131): bundle workspace dependencies into CLI for npm publish

- Replace tsc with tsup (esbuild) to inline @kb/* workspace code into a single dist/bin.js
- Move @kb/core, @kb/dashboard, @kb/engine from dependencies to devDependencies
- Add tsup.config.ts that copies dashboard client assets into dist/client/
- Add bundle output tests verifying shebang, inlined code, and no bare @kb/* imports
- Add changeset for the bundled CLI build fix

packages/cli/src/__tests__/package-config.test.ts

@@ -33,6 +33,12 @@ describe("CLI package.json publishing config", () => {
   it("is not private", () => {
     expect(pkg.private).not.toBe(true);
   });
+
+  it("does not have @kb/* workspace packages in dependencies", () => {
+    const deps = Object.keys(pkg.dependencies || {});
+    const kbDeps = deps.filter((d) => d.startsWith("@kb/"));
+    expect(kbDeps).toEqual([]);
+  });
 });
 
 describe("Scoped @kb/* packages publishing config", () => {