Optimize Neovim configuration structure and LSP setup

- Remove duplicate nvim-web-devicons loading (already in kickstart)
- Add clangd configuration to custom LSP setup with proper flags
- Replace complex clangd_helper with universal LSP reload keybind (<leader>lr)
- Clean up unused clangd target selection keybind
- Streamline plugin organization for better maintainability

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lua/custom/options.lua

@@ -18,4 +18,3 @@ vim.o.softtabstop = 2
 -- etc... Review the options section of your old init.lua and add any *changed* values here.
 -- The kickstart defaults are generally sensible, so you might not need many overrides.
 
--- print 'Custom options loaded!' -- Optional: Add print statement for debugging