Fonts rework (#12114)

- Use system fonts only for text to avoid FOUT
- Move font-awesome to npm/webpack
- Move NotoColorEmoji to web_src
- Remove presumably unneccesary 'PT Sans Narrow'
- Simplify webpack import exclusions

Fixes: https://github.com/go-gitea/gitea/issues/11818
Fixes: https://github.com/go-gitea/gitea/pull/11814

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>

templates/base/head.tmpl

@@ -91,7 +91,6 @@
 	<link rel="shortcut icon" href="{{StaticUrlPrefix}}/img/favicon.png">
 	<link rel="mask-icon" href="{{StaticUrlPrefix}}/img/gitea-safari.svg" color="#609926">
 	<link rel="fluid-icon" href="{{StaticUrlPrefix}}/img/gitea-lg.png" title="{{AppName}}">
-	<link rel="stylesheet" href="{{StaticUrlPrefix}}/vendor/assets/font-awesome/css/font-awesome.min.css">
 {{if .RequireSimpleMDE}}
 	<link rel="stylesheet" href="{{StaticUrlPrefix}}/vendor/plugins/simplemde/simplemde.min.css">
 {{end}}