refactor(workspace): rename @ktx/cli to @kaelio/ktx and pack it directly

Promote the CLI workspace package to the public name `@kaelio/ktx` and
drop the separate `scripts/build-public-npm-package.mjs` wrapper. The
CLI package is now publishable in place (`publishConfig.access: public`,
`provenance: true`), so artifact packing uses `pnpm pack` against
`packages/cli/` instead of assembling a parallel package tree.

Updates all workspace filter invocations, docs, tests, and release
readiness checks to reference the new package name, and folds the
tarball-name helper into `scripts/public-npm-release-metadata.mjs`.

packages/cli/src/cli-program.test.ts

@@ -12,7 +12,7 @@ function stubIo(): KtxCliIo {
 
 function stubPackageInfo(): KtxCliPackageInfo {
   return {
-    name: '@ktx/cli',
+    name: '@kaelio/ktx',
     version: '0.0.0-test',
   };
 }