add gdb as adapter

lua/custom/plugins.lua

@@ -734,6 +734,12 @@ local plugins = {
     end,
     config = function()
       local dap = require "dap"
+      dap.adapters.gdb = {
+        type = "executable",
+        command = "gdb",
+        args = { "-i", "dap" },
+      }
+
       dap.configurations.c = {
         {
           name = "Launch",
@@ -745,6 +751,8 @@ local plugins = {
           cwd = "${workspaceFolder}",
         },
       }
+      dap.configurations.rust = dap.configurations.c
+      dap.configurations.cpp = dap.configurations.c
     end,
   },
 }