refactor: restructure polish module from single file to modular directory format

Signed-off-by: User <user@example.com>

lua/polish/init.lua

@@ -0,0 +1,23 @@
+--- @meta
+
+--- Framework-specific tool configurations and installation utilities for Neovim.
+--- This module provides automatic installation of language servers and tools
+--- based on the current development framework environment.
+--- It reads the FRAMEWORK environment variable to determine which tools to install.
+
+-- Import Mason utilities from separate module
+local mason = require "polish.framework_mason_packages"
+
+-- Create user command for Mason installation
+vim.api.nvim_create_user_command(
+  "MasonInstallRorFramework", -- Command name
+  mason.InstallMyMasonPackages, -- Function to call
+  { nargs = 0 } -- Command takes no arguments
+)
+
+-- Module exports
+return {
+  FRAMEWORK_TOOLS = mason.FRAMEWORK_TOOLS,
+  get_framework_tools = mason.get_framework_tools,
+  InstallMyMasonPackages = mason.InstallMyMasonPackages,
+}