modularize statusline config | Make overriding of it actually work (#1307)

lua/ui/statusline/init.lua

@@ -0,0 +1,19 @@
+local modules = require "ui.statusline.modules"
+
+local user_override = require("core.utils").load_config().ui.statusline.override
+modules = vim.tbl_deep_extend("force", modules, user_override)
+
+return table.concat {
+   modules.mode(),
+   modules.fileInfo(),
+   modules.git(),
+
+   "%=",
+   modules.LSP_progress(),
+   "%=",
+
+   modules.LSP_Diagnostics(),
+   modules.LSP_status() or "",
+   modules.cwd(),
+   modules.cursor_position(),
+}