* chore(defaults.lua): add new options for vim

* feat(keymaps.lua): add new keymaps for various actions
* feat(treesitter.lua): add treesitter configuration for terraform language

* chore(init.lua): comment out unused keymap for signature help
* feat(plugins): add undotree plugin
* feat(plugins): add lsp_signature plugin and setup configuration

lua/custom/plugins/init.lua

@@ -4,4 +4,5 @@
 -- See the kickstart.nvim README for more information
 return {
   'fatih/vim-go',
+  'mbbill/undotree'
 }

lua/custom/plugins/lsp_signature.lua

@@ -0,0 +1,6 @@
+return {
+    'ray-x/lsp_signature.nvim',
+    config = function() 
+        require('lsp_signature').setup {}
+    end
+}