Docusaurus-ify main repo (#51)

https://github.com/go-gitea/gitea/pull/26051
https://github.com/go-gitea/gitea/pull/26052
https://github.com/go-gitea/gitea/pull/26053
Reviewed-on: https://gitea.com/gitea/gitea-docusaurus/pulls/51
Co-authored-by: jolheiser <john.olheiser@gmail.com>
Co-committed-by: jolheiser <john.olheiser@gmail.com>

check_outdated.sh

@@ -22,7 +22,7 @@ locale="$2"
 cur_path=`pwd`
 cd .tmp/upstream-docs-"$version"
 
-for file in `find ./docs/content/doc -name "*.${locale}.md"`; do
+for file in `find ./docs/content -name "*.${locale}.md"`; do
     file_en="${file/.${locale}/.en-us}"
     if [ ! -f "$file_en" ]; then
         continue