added keymap to copy buffer filename

lua/custom/keymaps/init.lua

@@ -10,3 +10,23 @@ vim.keymap.set(
     nowait = true
   }
 )
+
+-- copy file path
+--
+-- " full path
+-- :let @+ = expand("%:p")
+vim.keymap.set('n', '<leader>cbp', ':let @+ = expand("%:p")<CR>', {
+  desc = "[C]opy [B]uffer [P]ath"
+})
+
+-- " relative path
+-- :let @+ = expand("%")
+vim.keymap.set('n', '<leader>cbr', ':let @+ = expand("%")<CR>', {
+  desc = "[C]opy [B]uffer [R]elative path"
+})
+
+-- " just filename
+-- :let @+ = expand("%:t")
+vim.keymap.set('n', '<leader>cbn', ':let @+ = expand("%:t")<CR>', {
+  desc = "[C]opy [B]uffer [N]ame"
+})