[feat] Add stuff

config/nix/common/nvim.nix

@@ -0,0 +1,46 @@
+{ pkgs, inputs, ... }: {
+  imports = [ inputs.nixneovim.nixosModules.default ];
+  programs.nixneovim = {
+    enable = true;
+    extraConfigLua = ''
+      vim.opt.foldexpr = "v:lua.vim.treesitter.foldexpr()"
+      vim.opt.foldtext = "v:lua.vim.treesitter.foldtext()"
+    '';
+    options = {
+      number = true;
+      relativenumberr = true;
+    };
+    plugins = {
+      lspconfig = {
+        enable = true;
+        servers = {
+          rust-analyzer.enable = true;
+          nil.enable = true;
+        };
+      };
+      treesitter = {
+        enable = true;
+        indent = true;
+      };
+    };
+    colorschemes = {
+      catppuccin = {
+        enable = true;
+        flavour = "mocha";
+      };
+    };
+    mappings = {
+      normal = {
+        "<leader>ff" = "require'telescope.builtin'.find_files()";
+        "<leader>gg" = "require'telescope.builtin'.live_grep()";
+        "<leader>;" = "require'telescope.builtin'.buffers()";
+        "<leader><leader>" = "<c-^>";
+        "vff" = "<cmd>vertical Gdiffsplit<cr>";
+        "<C-k>" = "vim.lsp.buf.definition()";
+        "gi" = "vim.lsp.buf.implementation()";
+        "<leader>a" = "vim.lsp.buf.code_action()";
+        "F" = "vim.lsp.buf.format( async = true )";
+      };
+    };
+  };
+}