feat(git): Add install/hie.yaml to gitignore

[sir4ur0n]

Closes #326

[Ailrun]

Great, thanks

[sir4ur0n]

I think build failed for an unrelated reason, if anyone can restart it?

[jneira]

Maybe we could ignore all possible hie.yaml's in the code base with:

**/hie.yaml

?

@sir4ur0n I've reran the build!

[sir4ur0n]

Maybe we could ignore all possible hie.yaml's in the code base with:

**/hie.yaml

?

I thought about it but then thought "What if in the future some (integration?) tests want to test hie.yaml integration?".

If you prefer though, I can switch to wildcard hie.yaml rather than absolute paths, let me know!

[jneira]

I thought about it but then thought "What if in the future some (integration?) tests want to test hie.yaml integration?".

good point, better being cautious