fix(cli): enable compile cache before importing the CLI (#2648)

The npm `vp` wrapper calls `enableCompileCache()`, but its static import
loads and evaluates the CLI dependency graph before that call executes.
Use an awaited dynamic import so the existing cache initialization
happens first.

The regression test runs the real wrapper in an isolated ESM fixture. It
fails on the previous code (`getCompileCacheDir()` is undefined during
CLI module evaluation) and passes with this change. It also checks
arguments containing spaces and preserves a nonzero exit code.

This affects the npm wrapper; it does not claim to optimize the
native/global entrypoint that bypasses it. Downstream warm-cache
measurements on Linux/Node 24.19 showed approximately 36 ms less time
for a full check and 42 ms for a three-file check; these are
project-specific measurements, not a universal benchmark.

Validation on the submitted commit, using frozen pnpm 11.24.0
installations for the workspace and docs, the pinned Rolldown/Vite
source revisions, and nightly-2026-08-02 Rust:

- `pnpm build`: complete source build passed, including Rolldown,
Vite/core, CLI JavaScript and the native CLI binding.
- Full unit suite through the freshly built npm wrapper: **1,188 passed,
one platform skip**, across 77 files on Vitest 4.1.11 (5.34 seconds).
- Full repository native TypeScript check (`tsgo --noEmit`): passed
after installing the separately documented docs dependencies.
- `vp check packages/cli/src/__tests__/bootstrap-compile-cache.spec.ts`:
formatting, type-aware lint and type checks passed with the repository's
configuration.
- `node --check packages/cli/bin/vp` and the built wrapper's `--version`
command: passed.

The ordinary `pnpm test:unit` invocation initially had two
environment-dependent failures: pnpm's shim injected `NODE_PATH`,
allowing a deliberately missing-dependency fixture to resolve an
unrelated hoisted Vite; a hook test assumes `/usr/bin/dirname` and an
ordinary `/bin/sh`, whereas this NixOS host has no `/usr/bin/dirname`
and wraps `/bin/sh` with a modified PATH. All tests passed when invoking
`node packages/cli/bin/vp test --run --maxWorkers=4` with `NODE_PATH`,
`NO_COLOR` and `FORCE_COLOR` cleared, inside a temporary Bubblewrap
environment supplying standard coreutils and a plain Bash `/bin/sh`. No
production code, test assertions, snapshots or host system paths were
changed to accommodate these failures.

The whole Rust workspace test suite, PTY/browser snapshot matrix and
cross-platform CI matrix were not run locally.

After the repository's documented dependency setup, run the regression
test with:

```sh
pnpm test:unit packages/cli/src/__tests__/bootstrap-compile-cache.spec.ts
```

This is an isolated bootstrap unit test: the CLI module is a fixture, so
it tests ESM initialization order without exercising command output or
the native CLI.

AI assistance: implementation and self-review performed with OpenAI
Codex using GPT-6 Astra (`gpt-6-astra`), with reasoning effort set to
`high`.

---------

Signed-off-by: MK (fengmk2) <fengmk2@gmail.com>
Co-authored-by: MK (fengmk2) <fengmk2@gmail.com>

Author: pablog12

packages/cli/bin/vp

@@ -4,4 +4,4 @@ import module from 'node:module';
 if (module.enableCompileCache) {
   module.enableCompileCache();
 }
-import '../dist/bin.js';
+await import('../dist/bin.js');