fix: clear all marks not persisting changes

The UI was calling storage.clear_all_marks() directly which only cleared
marks in memory. Now uses the main module's method to properly save changes.

Solves: #16

Author: alexekdahl

lua/marksman/ui.lua

@@ -438,8 +438,8 @@ local function setup_window_keymaps(buf, marks, project_name, mark_info, search_
 			prompt = "Clear all marks in this project?",
 		}, function(choice)
 			if choice == "Yes" then
-				local storage = require("marksman.storage")
-				storage.clear_all_marks()
+				local marksman = require("marksman")
+				marksman.clear_all_marks()
 				close_window()
 				notify("󰃀 All marks cleared", vim.log.levels.INFO)
 			end