Get workflow runs for a PR

[wd60622]

Should be able to add the branch flag to the current function call here:

octo.nvim/lua/octo/workflow_runs.lua

Lines 652 to 656 in 03052ea

	local output, stderr = gh.run.list {
	json = run_list_fields,
	limit = workflow_limit,
	opts = { mode = "sync" },
	}

then expose it here:

octo.nvim/lua/octo/workflow_runs.lua

Lines 703 to 705 in 03052ea

	M.list = function()
	utils.info "Fetching workflow runs (this may take a while) ..."
	local wf_runs = get_workflow_runs_sync()

as well as in the commands.lua

Though it would be using the workflow logic, I think Octo pr runs might make sense as a command.

Thoughts on this? @GustavEikaas