feat: up flake, configure dap for rust and change some neovim defaults

programs/neovim/user/dap/adapters.lua

@@ -0,0 +1,10 @@
+return {
+  codelldb = {
+    type = "server",
+    port = "${port}",
+    executable = {
+      command = "codelldb",
+      args = { "--port", "${port}" },
+    },
+  },
+}

programs/neovim/user/dap/configurations.lua

@@ -0,0 +1,12 @@
+return {
+  rust = {
+    {
+      name = "Launch file",
+      type = "codelldb",
+      request = "launch",
+      program = function() return vim.fn.input("Path to executable: ", vim.fn.getcwd() .. "/", "file") end,
+      cwd = "${workspaceFolder}",
+      stopOnEntry = false,
+    },
+  },
+}