[FEATURE] - `lola sync` assistant flag

[mikemorency]

Feature Description

I'd like a way to specify what assistant(s) should be setup when running lola sync, without specifying the assistants in the .lola-req file.

Problem or Use Case

As a project maintainer, I find the .lola-req file useful for indicating what modules are helpful for developers. However, I cannot specify the assistant type in the requirement file since the assistants I use may not be the same assistants that other developers use.
This means that when I run lola sync, it configures all assistants and creates a lot of clutter in my workspace. Id like to be able to specify the assistant types to configure outside of the requirement file.

Category

CLI/UX improvements

Proposed Solution

I think an additive command line argument would work well.
For example lola sync -a cursor would run the sync for cursor, as well as any agents explicitly specified in the requirements file.

Alternatives Considered

This is mostly an aesthetic issue, since the files generated by lola are in my .gitignore anyway

Complexity Estimate

Simple (good first issue)

Additional Context

No response