feat: Clone existing repository config

[alyssaholland99]

Added a button to clone existing repository configs. This preserves everything about the repository config you're trying to clone, while all fields remain editable, allowing you to use the same settings for different repositories.

[alyssaholland99]

Repository config to clone, notice the new "Clone Repository Config" button.

Modal shown after the 'Clone Repository Config' button is clicked

Cloned repository config saved successfully

[alyssaholland99]

@garethgeorge The PRs I've put up should be ready for review if you have the time :)

[garethgeorge]

Hi -- thanks for the interest in contributing, appreciate the PR! I want to start out with this is definitely a long standing issue and something I'd like to address, but I'm a bit opinionated about the right way to solve this.

I'm hesitant to introduce a new button on the submit rows of the repo / plan UIs since they'll become cluttered, duplicating plans or copying configuration is only something we think about when making a new plan or repo.

My thinking for a good solution to this is that it should be something like an optional dropdown when creating a new plan or repo (from an empty state) which allows the user to copy settings from an existing plan / repo.

wdyt?

[alyssaholland99]

Oh that's a good idea - I'll look at implementing this both on this PR and on the plan PR :)