fix: ignore changes to import files inside addons for updates

[andersmmg]

Fixes #202 in my testing, just depends if this should be default or an optional thing?

[wlsnmrk]

Thanks for putting this together! Looks like a reasonable approach to me.

Would you be willing to add a test verifying the creation of the file? It could probably be expressed as another expected call to client in the existing AddonsRepository test named InstallAddonFromCacheCopiesCachedAddonToAddonsPath.

(Aside: @jolexxa, I don't think we need to address this in this PR, and no one's complained about it yet, but at some point we may need to consider how we're going to handle .import files in symlink addons.)

[wlsnmrk]

To address your question: I lean toward "this should be optional behavior." If the addon author did commit their .import files and then you've changed the import settings locally, you might want to be alerted to that fact. @jolexxa Any thoughts?

[andersmmg]

I can add a cli argument to enable this, I'm thinking "--ignore-imports" or something similar. I added to the test, lmk if I did that right for how it works now, I can make it conditional as well if I add the argument though. Another thought I had, what if an addon has a .gitignore included in it? Should it just add *.import to it?

[jolexxa]

Another thought I had, what if an addon has a .gitignore included in it? Should it just add *.import to it?

Yes :)