Improved the Handling of Errors in Rule Collection

[surge119]

Summary

If a rule defined in a config contains an error or causes an error in Fixit, the linter will raise an unrecoverable error. This PR adds error handling to catch and log those errors as warnings, and continue linting

Test Plan

$ hatch run fixit lint ./src/fixit/api.py
WARNING:fixit.config:Failed to load rules 'fixit.rules': CollectionError: could not import rule(s) fixit.rules
🧼 1 file clean 🧼

# Run with good rules
$ hatch run fixit lint ./src/fixit/api.py
🧼 1 file clean 🧼