added mini ai

lua/plugins/mini_ai.lua

@@ -0,0 +1,10 @@
+return {
+  'echasnovski/mini.ai',
+  config = function()
+    require('mini.ai').setup({
+      -- Number of lines within which textobject is searched
+      n_lines = 150,
+      search_method = 'cover',
+    })
+  end,
+}