fix: improve plugin import error (#1674)

.changeset/seven-rocks-laugh.md

@@ -0,0 +1,5 @@
+---
+"@redocly/cli": patch
+---
+
+Get more helpful error messages when there's a problem importing a plugin.

packages/core/src/config/config-resolvers.ts

@@ -155,10 +155,7 @@ export async function resolvePlugins(
           return mod.default || mod;
         }
       } catch (e) {
-        if (e instanceof SyntaxError) {
-          throw e;
-        }
-        throw new Error(`Failed to load plugin "${plugin}". Please provide a valid path`);
+        throw new Error(`Failed to load plugin "${plugin}": ${e.message}\n\n${e.stack}`);
       }
     }