`fprime-util format` should work for libraries

F´ Version
Affected Component

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Feature Description

An F´ library isn't a project, yet it still should be able to be formattable. The issue is that there's no easy way to go find the default F´ .clang-format file. Either libraries should provide their own, or maybe we could add in the behavior to go fetch that file and put it in the root of the library. Many possible solutions.

Expected behavior:

• clone an F´ library (such as https://github.com/fprime-community/fprime-zephyr) outside of a project
• run cd fprime-zephyr && fprime-util format --dirs ./Svc should work