add toggleterm plugin

modules/editor/neovim/lua/packer/toggleterm.lua

@@ -0,0 +1,37 @@
+local M = {}
+
+M.packer = function(use)
+    use({
+        "akinsho/toggleterm.nvim",
+        tag = "v2.*",
+        config = function()
+            require("toggleterm").setup({
+                open_mapping = [[<c-\>]],
+                hide_numbers = true,
+                direction = "float",
+            })
+
+            vim.keymap.set("t", "<A-CR>", "<C-\\><C-n>") --- Exit terminal mode
+
+            -- Only set these keymaps for toggleterm
+            vim.api.nvim_create_autocmd("TermOpen", {
+                pattern = "term://*toggleterm#*",
+                callback = function()
+                    -- vim.keymap.set("t", "<Esc>", "<C-\\><C-n>") --- Exit terminal mode
+                    vim.keymap.set("t", "<C-h>", "<C-\\><C-n><C-w>h")
+                    vim.keymap.set("t", "<C-j>", "<C-\\><C-n><C-w>j")
+                    vim.keymap.set("t", "<C-k>", "<C-\\><C-n><C-w>k")
+                    vim.keymap.set("t", "<C-l>", "<C-\\><C-n><C-w>l")
+                end,
+            })
+
+            local terminal = require("toggleterm.terminal").Terminal
+            local nixpkgs = terminal:new({ cmd = "nix repl '<nixpkgs>'" })
+            function NIXPKGS_TOGGLE()
+                nixpkgs:toggle()
+            end
+        end,
+    })
+end
+
+return M