Plugin import error is misleading

[RomanHotsiy]

Describe the bug
If the plugin fails to import the error is misleading, it always shows: "Please provide a valid path"

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

Line 92 in 2079ea6

throw new Error(`Failed to load plugin "${plugin}". Please provide a valid path`);

To Reproduce

• Create a plugin with a syntax error.
• Provide valid path to a plugin in redocly.yaml
• See the errors says Please provide a valid path

Expected behavior
Should show original import error.

[lornajane]

Thanks for logging this, I've definitely run into it before!