[Chinese Bad English] Scan for minecraft instance on first run after install

[Yuang114514]

Please confirm the following.

• [x] I checked the existing issues for duplicate feature requests
• [x] I have checked that this feature request is not on our roadmap

What parts of Modrinth is your feature request related too?

Modrinth App

Is your suggested feature related to a problem? Please describe.

No.

Describe the solution you'd like

I am a minecraft player from other chinese launchers, am trying to use some foreign launcher. I found that there's no any launcher i use in the Creating An New Instance -> Import From Launcher screen. In my knowledge, all minecraft instance's directory tree format are simillar, so maybe we can run from existing installed instances directly.

Scan for .minecraft directory in:

• Vanilla Launcher Directory (C:\Users*\AppData\Local\Roaming.minecraft
• Same Directory of Launcher Installed
• Any Directory if User Imported (in a new tab of Creating An New Instance)

Describe alternatives you've considered

I know two directory tree formats:

• vanilla launcher format: all instances in a .minecraft directory, put saves, screenshots etc in the same directory to keep them common in any version
• modded launcher format: only assets, libaries, versions in .minecraft directory, put other things (mods, config, logs, saves etc) in versions directory

once the imported directory tree format matches one of above, add got instances to the list of launcher.

Additional context

No response