JavaScript: setupSharedDependencies must search inside the recipe directory itself (#7515)

When a recipe is installed by local path (e.g.
`mod config recipes npm install /path/to/my-recipes`), `targetModulePath`
is the package directory itself. `path.dirname(targetModulePath)` jumps
to the parent and the upward `node_modules` walk never enters the
package's own `node_modules`, so the target package root for shared
dependencies (`@openrewrite/rewrite`, `vscode-jsonrpc`, `mutative`) is
never found and the host→target require.cache mapping is skipped.

The downstream symptom is the dual-package problem: the recipe ends up
with its own `@openrewrite/rewrite` instance, distinct from the host's,
so `recipe instanceof ScanningRecipe` in `rpc/request/visit.ts` returns
`false`. The runtime then skips the `scan:` phase entirely. Editors are
still invoked (~3000 times per cemex run in our reproducer), but every
accumulator is empty, so `UpgradeDependencyVersion` silently returns
`doc` from `package.json` and no version bumps land — even though the
install in the temp dir would have succeeded.

When `targetModulePath` resolves to a directory, start the
`node_modules` walk from the directory itself; only fall back to
`path.dirname` when it resolves to a file.

Repro: any local-path-installed recipe set whose `package.json`
declares `@openrewrite/rewrite` as a dependency. Before this change,
rpc.log shows `Could not find @openrewrite/rewrite in target's
node_modules`. After, it shows `Mapped <N> modules for
@openrewrite/rewrite`.

Author: Jenson3210

rewrite-javascript/rewrite/src/rpc/request/install-recipes.ts

@@ -197,7 +197,15 @@ function preloadCoreModules(logger?: rpc.Logger) {
  */
 function setupSharedDependencies(targetModulePath: string, logger?: rpc.Logger) {
     const sharedDeps = ['@openrewrite/rewrite', 'vscode-jsonrpc', 'mutative'];
-    const targetDir = path.dirname(targetModulePath);
+    // For local-path installs, targetModulePath is the package dir itself.
+    let targetDir: string;
+    try {
+        targetDir = fs.statSync(targetModulePath).isDirectory()
+            ? targetModulePath
+            : path.dirname(targetModulePath);
+    } catch {
+        targetDir = path.dirname(targetModulePath);
+    }
 
     sharedDeps.forEach(depName => {
         try {