Adds window resizing keymaps and Monokai theme

Implements keymaps for window resizing and maximizing, providing more flexibility in window management.

Also, includes Monokai theme with classic palette as a user option.

Adds cpp to ensure_installed languages for treesitter.

Add C LSP in Mason Plugin

Added after folder to make sure comment string isn't altered by other plugins

ftplugin/c.lua

@@ -0,0 +1,19 @@
+-- local set = vim.opt_local
+
+-- Define a custom command ':intmain' that inserts int main() {} template
+vim.api.nvim_create_user_command('IntMain', function()
+  local current_line = vim.api.nvim_win_get_cursor(0)[1]
+  local lines = {
+    '#include <stdio.h>',
+    '',
+    'int main ()',
+    '{',
+    '  ',
+    '  printf();',
+    '  return 0;',
+    '}',
+  }
+  vim.api.nvim_buf_set_lines(0, current_line - 1, current_line - 1, false, lines)
+  -- Position cursor inside the function body
+  vim.api.nvim_win_set_cursor(0, { current_line + 1, 4 })
+end, {})