plugin/explorer: add telescope nvim plugin

plugins/explorer/default.nix

@@ -1,7 +1,11 @@
-{ nvim-tree-lua, ... }:
+{ nvim-tree-lua, telescope-nvim, ... }:
 
 {
-  luaConfig = builtins.readFile ./nvim-tree.lua;
+  luaConfig = (builtins.readFile ./nvim-tree.lua)
+    + (builtins.readFile ./telescope-nvim.lua);
 
-  plugins = [ nvim-tree-lua ];
+  plugins = [
+    nvim-tree-lua
+    telescope-nvim
+  ];
 }

plugins/explorer/telescope-nvim.lua

@@ -0,0 +1,7 @@
+-- See: https://github.com/nvim-telescope/telescope.nvim
+require("telescope").setup({})
+
+vim.keymap.set("n", "<leader>ff", "<Cmd>Telescope find_files<CR>")
+vim.keymap.set("n", "<leader>fg", "<Cmd>Telescope live_grep<CR>")
+vim.keymap.set("n", "<leader>fb", "<Cmd>Telescope buffers<CR>")
+vim.keymap.set("n", "<leader>fh", "<Cmd>Telescope help_tags<CR>")