Merge 'upstream' rename <C-t>, use opts for treesitter

- chore: rename <C-T> to <C-t> for consistency

- feat: allow treesitter defaults to be overwritten from custom directory

lua/kickstart/plugins/lspconfig.lua

@@ -56,7 +56,7 @@ return {
 
           -- Jump to the definition of the word under your cursor.
           --  This is where a variable was first declared, or where a function is defined, etc.
-          --  To jump back, press <C-T>.
+          --  To jump back, press <C-t>.
           map('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
 
           -- Find references for the word under your cursor.