refactor(debug): inline C/C++ DAP setup into debug plugin spec

dap_cpp.lua was a separate module used in exactly one place.
Inlined setup_cpp_dap() directly into debug.lua to remove
the unnecessary indirection.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lua/custom/dap_cpp.lua

@@ -1,43 +0,0 @@
-local M = {}
-
-local function has_configuration(configurations, name, adapter)
-  for _, configuration in ipairs(configurations or {}) do
-    if configuration.name == name and configuration.type == adapter then
-      return true
-    end
-  end
-
-  return false
-end
-
-function M.setup(dap)
-  dap = dap or require 'dap'
-
-  dap.adapters.codelldb = dap.adapters.codelldb or {
-    type = 'executable',
-    command = 'codelldb',
-  }
-
-  local launch_name = 'Launch current file (codelldb)'
-  local launch_configuration = {
-    name = launch_name,
-    type = 'codelldb',
-    request = 'launch',
-    program = function()
-      return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file')
-    end,
-    cwd = '${workspaceFolder}',
-    stopOnEntry = false,
-    args = {},
-  }
-
-  for _, language in ipairs { 'c', 'cpp' } do
-    dap.configurations[language] = dap.configurations[language] or {}
-
-    if not has_configuration(dap.configurations[language], launch_name, 'codelldb') then
-      table.insert(dap.configurations[language], vim.deepcopy(launch_configuration))
-    end
-  end
-end
-
-return M

lua/custom/plugins/debug.lua

@@ -6,6 +6,44 @@
 -- be extended to other languages as well. That's why it's called
 -- kickstart.nvim and not kitchen-sink.nvim ;)
 
+local function has_configuration(configurations, name, adapter)
+  for _, configuration in ipairs(configurations or {}) do
+    if configuration.name == name and configuration.type == adapter then
+      return true
+    end
+  end
+
+  return false
+end
+
+local function setup_cpp_dap(dap)
+  dap.adapters.codelldb = dap.adapters.codelldb or {
+    type = 'executable',
+    command = 'codelldb',
+  }
+
+  local launch_name = 'Launch current file (codelldb)'
+  local launch_configuration = {
+    name = launch_name,
+    type = 'codelldb',
+    request = 'launch',
+    program = function()
+      return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file')
+    end,
+    cwd = '${workspaceFolder}',
+    stopOnEntry = false,
+    args = {},
+  }
+
+  for _, language in ipairs { 'c', 'cpp' } do
+    dap.configurations[language] = dap.configurations[language] or {}
+
+    if not has_configuration(dap.configurations[language], launch_name, 'codelldb') then
+      table.insert(dap.configurations[language], vim.deepcopy(launch_configuration))
+    end
+  end
+end
+
 return {
   -- NOTE: Yes, you can install new plugins here!
   'mfussenegger/nvim-dap',
@@ -146,6 +184,6 @@ return {
       },
     }
 
-    require('custom.dap_cpp').setup(dap)
+    setup_cpp_dap(dap)
   end,
 }