Add searched repo type to api/repo/search

[Morlinest]

I want to add an option to look for a specific type of repo (fork, mirror, source, collaborative or all). I think there are two options how to search repositories:

1. Search only 1 type - this means SearchRepoOptions will contain 1 attribute with one of possible values
2. Search any combination of types at once - this means SearchRepoOptions will contains every possible option and result will be their mix (OR), for example mirror OR fork repositories

Any opinion? I've already done the first option, but second can be done very fast too.

[lunny]

I think one is enough.

[Morlinest]

On first option I don't like the code (can be just bad because of my skills in GO and understanding this project code). I need new type RepoType, const for each type (like RepoTypeAll,RepoTypeFork, ...) and then 'map[string]RepoType' in handler to map query to this types. In second option, I can add each type directly to SearchRepoOptions as bools and use ifs in handler to set it. This is my "code" dilema :D

[lunny]

I like first option.

[Morlinest]

@lunny OK :) Will send PR soon, you can assign this issue to me.

[Morlinest]

Closed by #2756