Add lazygit integration

When <leader>lg is pressed, it runs lazygit overtop Neovim.

lua/plugins/lazygit.lua

@@ -0,0 +1,20 @@
+-- nvim v0.8.0
+return {
+    "kdheepak/lazygit.nvim",
+    cmd = {
+        "LazyGit",
+        "LazyGitConfig",
+        "LazyGitCurrentFile",
+        "LazyGitFilter",
+        "LazyGitFilterCurrentFile",
+    },
+    -- optional for floating window border decoration
+    dependencies = {
+        "nvim-lua/plenary.nvim",
+    },
+    -- setting the keybinding for LazyGit with 'keys' is recommended in
+    -- order to load the plugin when the command is run for the first time
+    keys = {
+        { "<leader>lg", "<cmd>LazyGit<cr>", desc = "LazyGit" },
+    },
+}