[chore] Text formatting overhaul (#1406)

* Implement goldmark debug print for hashtags and mentions

* Minify HTML in FromPlain

* Convert plaintext status parser to goldmark

* Move mention/tag/emoji finding logic into formatter

* Combine mention and hashtag boundary characters

* Normalize unicode when rendering hashtags

internal/text/minify.go

@@ -0,0 +1,45 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package text
+
+import (
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+	"github.com/tdewolff/minify/v2"
+	"github.com/tdewolff/minify/v2/html"
+)
+
+var (
+	m *minify.M
+)
+
+func minifyHTML(content string) string {
+	if m == nil {
+		m = minify.New()
+		m.Add("text/html", &html.Minifier{
+			KeepEndTags: true,
+			KeepQuotes:  true,
+		})
+	}
+
+	minified, err := m.String("text/html", content)
+	if err != nil {
+		log.Errorf("error minifying HTML: %s", err)
+	}
+	return minified
+}