refactor: optimized engines directory retrieval (#1359)

* refactor: replacing existing way to retrieve the actual node_directory

especially for npm workspaces usage (aka npm 7 monorepos)

* refactor: outputting the engines directory path as well for debugging

Author: mfranzke

packages/core/src/lib/pattern_engines.js

@@ -9,14 +9,16 @@ const engineMatcher = /^engine-(.*)$/;
 
 const logger = require('./log');
 
+const { resolvePackageFolder } = require('@pattern-lab/core/src/lib/resolver');
+
 const enginesDirectories = [
   {
     displayName: 'the core',
     path: path.resolve(__dirname, '..', '..', 'node_modules'),
   },
   {
-    displayName: 'the edition or test directory',
-    path: path.join(process.cwd(), 'node_modules'),
+    displayName: 'the general node_modules directory',
+    path: path.resolve(resolvePackageFolder('@pattern-lab/core'), '..', '..'),
   },
 ];
 
@@ -87,7 +89,9 @@ const PatternEngines = Object.create({
         engineDirectory.path
       );
 
-      logger.debug(`Loading engines from ${engineDirectory.displayName}...`);
+      logger.debug(
+        `Loading engines from ${engineDirectory.displayName}: ${engineDirectory.path} ...`
+      );
 
       // find all engine-named things in this directory and try to load them,
       // unless it's already been loaded.