feat: Combine configuration into picker.new()

scratch/rocker_example.lua

@@ -0,0 +1,24 @@
+
+
+builtin.git_files = function(opts)
+  opts = opts or {}
+
+  opts.show_preview = get_default(opts.show_preview, true)
+
+  opts.finder = opts.finder or finders.new {
+    static = true,
+
+    fn_command = function()
+      return {
+        command = 'git',
+        args = {'ls-files'}
+      }
+    end,
+  }
+
+  opts.prompt = opts.prompt or 'Simple File'
+  opts.previewer = opts.previewer or previewers.cat
+  opts.sorter = opts.sorter or sorters.get_norcalli_sorter()
+
+  pickers.new(opts):find()
+end