Is your feature request related to a problem? Please describe.
I like the builtin.marks() picker, but the fact that it shows all the marks I have across all my projects make it significantly less usable for me. I felt the same way about the oldfiles picker, but that was easily resolved with the cwd_only = true option. Unfortunately that option does not exist for the marks picker.

Describe the solution you'd like
Have the marks() picker support the cwd_only option to only show marks in the current working directory instead of all marks across all projects.

Describe alternatives you've considered
N/A