fix: Use noremap when mapping. (#286)

Previously, if e.g. : was remapped, Telescope would be unclosable with
its mappings (<Esc>).

(Do the same for ensuring we :silent)

lua/telescope/mappings.lua

@@ -94,9 +94,9 @@ local telescope_map = function(prompt_bufnr, mode, key_bind, key_func, opts)
     return
   end
 
-  opts = opts or {
+  opts = opts or {}
-    silent = true
+  if opts.noremap == nil then opts.noremap = true end
-  }
+  if opts.silent == nil then opts.silent = true end
 
   if type(key_func) == "string" then
     a.nvim_buf_set_keymap(