Autodetect parser name with prettier by default (#11558)

Closes https://github.com/zed-industries/zed/issues/11517 

* Removes forced prettier parser name for languages, making `auto`
command to run prettier on every file by default.
* Moves prettier configs away from plugin language declarations into
language settings

Release Notes:

- N/A

crates/languages/src/javascript/config.toml

@@ -17,7 +17,6 @@ brackets = [
 word_characters = ["$", "#"]
 tab_size = 2
 scope_opt_in_language_servers = ["tailwindcss-language-server", "emmet-language-server"]
-prettier_parser_name = "babel"
 
 [overrides.element]
 line_comments = { remove = true }