feat(nvim): add new mappings for selecting next and prev item in the cmp cmdline

config/nvim/lua/plugins/cmp.lua

@@ -57,7 +57,26 @@ return {
     }
 
     cmp.setup.cmdline({ "/", "?" }, {
-      mapping = cmp.mapping.preset.cmdline(),
+      mapping = cmp.mapping.preset.cmdline({
+        ["<C-j>"] = {
+          c = function(fallback)
+            if cmp.visible() then
+              cmp.select_next_item()
+            else
+              fallback()
+            end
+          end,
+        },
+        ["<C-k>"] = {
+          c = function(fallback)
+            if cmp.visible() then
+              cmp.select_prev_item()
+            else
+              fallback()
+            end
+          end,
+        },
+      }),
       sources = {
         { name = "buffer" },
       },