feat(config): add more config file name and extension

[richrdkng]

🚀 Description

For `@nodewell/path to be more usable, multiple config file name and extensions should be added.

💡 Solution

Add support for the following:

• .pathrc.json
• .pathsrc.json
• .pathrc.json5
• .pathsrc.json5

Also these files can contain JavaScript, JSON, and JSON5 (the content will be automatically detected):

• .pathrc
• .pathsrc

Also add a CLI option for custom config files, e.g.: npx @nodewell/path -- --config=paths.js