feat(rome_service): add extends functionality

[ematipico]

Summary

Closes #4038

This PR introduces breaking changes, mainly how the CLI handles broken configurations.

Before, a broken configuration would have resulted in warnings and Rome applying its defaults for the broken sections. I realised that while this is "cool", this isn't ideal for users because this would result in the following:

• false positives while running the linter
• incorrect formatting, with a configuration that isn't the one of the users

That's a breaking change.

Plus, now the rome check command shows diagnostics that belong to the formatter too.

Test Plan

Added some test cases

Changelog

• The PR requires a changelog line

Documentation

• The PR requires documentation
• I will create a new PR to update the documentation

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