Fix nvim-dap not lazy loading (nvim-lua#1216)

* Fix nvim-dap not lazy loading

The keys property had local variables 'dap' and 'dap-ui' that used `require` and prevented all DAP related plugins from lazy-loading.
Fixed this by changing keys to a table and substituting the local variables with a lamba function

* Make debug keybind descriptions more consistent

lua/kickstart/plugins/debug.lua

@@ -24,28 +24,59 @@ return {
     -- Add your own debuggers here
     'leoluz/nvim-dap-go',
   },
-  keys = function(_, keys)
-    local dap = require 'dap'
-    local dapui = require 'dapui'
-    return {
-      -- Basic debugging keymaps, feel free to change to your liking!
-      { '<F5>', dap.continue, desc = 'Debug: Start/Continue' },
-      { '<F1>', dap.step_into, desc = 'Debug: Step Into' },
-      { '<F2>', dap.step_over, desc = 'Debug: Step Over' },
-      { '<F3>', dap.step_out, desc = 'Debug: Step Out' },
-      { '<leader>b', dap.toggle_breakpoint, desc = 'Debug: Toggle Breakpoint' },
-      {
-        '<leader>B',
-        function()
-          dap.set_breakpoint(vim.fn.input 'Breakpoint condition: ')
-        end,
-        desc = 'Debug: Set Breakpoint',
-      },
-      -- Toggle to see last session result. Without this, you can't see session output in case of unhandled exception.
-      { '<F7>', dapui.toggle, desc = 'Debug: See last session result.' },
-      unpack(keys),
-    }
-  end,
+  keys = {
+    -- Basic debugging keymaps, feel free to change to your liking!
+    {
+      '<F5>',
+      function()
+        require('dap').continue()
+      end,
+      desc = 'Debug: Start/Continue',
+    },
+    {
+      '<F1>',
+      function()
+        require('dap').step_into()
+      end,
+      desc = 'Debug: Step Into',
+    },
+    {
+      '<F2>',
+      function()
+        require('dap').step_over()
+      end,
+      desc = 'Debug: Step Over',
+    },
+    {
+      '<F3>',
+      function()
+        require('dap').step_out()
+      end,
+      desc = 'Debug: Step Out',
+    },
+    {
+      '<leader>b',
+      function()
+        require('dap').toggle_breakpoint()
+      end,
+      desc = 'Debug: Toggle Breakpoint',
+    },
+    {
+      '<leader>B',
+      function()
+        require('dap').set_breakpoint(vim.fn.input 'Breakpoint condition: ')
+      end,
+      desc = 'Debug: Set Breakpoint',
+    },
+    -- Toggle to see last session result. Without this, you can't see session output in case of unhandled exception.
+    {
+      '<F7>',
+      function()
+        require('dapui').toggle()
+      end,
+      desc = 'Debug: See last session result.',
+    },
+  },
   config = function()
     local dap = require 'dap'
     local dapui = require 'dapui'