Feature request: setqflist first hunk per file

[tesar-tech]

Hi! Could you consider adding a mode to populate the quickfix list with only the first hunk per file?

Current workaround:

• Gitsigns setqflist all fills qf with all hunks
• I then filter the qf list in Lua to keep only one item per file
• This is hacky and timing-sensitive because the list is populated asynchronously

Proposed behavior:

• New command or flag, e.g.:
  • :Gitsigns setqflist first or
  • :Gitsigns setqflist all first_per_file
• Resulting quickfix list should contain only one entry per file (the first hunk in that file)
• Should work across all tracked files, like all does

Use case:
I want a quick, one‑entry‑per‑file overview of changed files with hunks, and I use :cnext/:cprev to jump file‑to‑file without having to sift through every hunk. Inside the file i use Gitsing next/prev_hunk (which works flawlessly)
If there’s already a recommended API or extension point to do this cleanly, I’m happy to use that instead. If there is not, would you consider this feature to be part of the plugin if I made the pr?

Thanks!