fix: resolve use-m ESM/CJS interop for yargs on Node.js v23+

[fredericgermain]

Problem

Closes #55

claude-profiles fails on Node.js v23+ (and v24) with errors like:

```
TypeError: hideBin is not a function
TypeError: yargs is not a function
TypeError: archiver is not a function
```

Root Cause

use-m dynamically loads CJS packages into an ESM context. On newer Node.js versions, it wraps default exports under a .default property instead of returning them directly. This affects callable default exports (yargs, archiver) and named exports accessed via helpers (yargs/helpers).

Fix

Apply defensive .default unwrapping to all four use-m loaded packages:

```diff
-const [{ $ }, _yargs, yargsHelpers, archiver] = await Promise.all([
+const [_commandStream, _yargs, _yargsHelpers, _archiver] = await Promise.all([
use('command-stream@0.7.0'),
use('yargs@17.7.2'),
use('yargs@17.7.2/helpers'),
use('archiver@7.0.1')
]);

-// use-m wraps CJS modules under .default in ESM context; unwrap defensively
+// use-m wraps CJS modules under .default in ESM context on Node.js v23+; unwrap defensively
+// command-stream exports $ as a named export at the top level (not under .default)
+const { $ } = _commandStream;
const yargs = (typeof _yargs === 'function') ? _yargs : (_yargs?.default ?? _yargs);
-const hideBin = yargsHelpers?.hideBin ?? yargsHelpers?.default?.hideBin ?? ((argv) => argv.slice(2));
+const hideBin = _yargsHelpers?.hideBin ?? _yargsHelpers?.default?.hideBin ?? ((argv) => argv.slice(2));
+const archiverFn = (typeof _archiver === 'function') ? _archiver : (_archiver?.default ?? _archiver);
```

Module	Pattern	Reason
command-stream	const { $ } = _commandStream	$ is a named export at top level — no .default needed
yargs	typeof fn ? fn : fn.default ?? fn	Callable default export wrapped under .default
yargs/helpers	x.hideBin ?? x.default.hideBin ?? fallback	Named export hideBin is under .default
archiver	typeof fn ? fn : fn.default ?? fn	Callable default export wrapped under .default

Testing

Verified on Node.js v24.12.0 — claude-profiles --store global and claude-profiles --help work correctly after the fix.