rename Context
move things to IssueActions
rm unused API func
get Context only one time
add repoWatch into tinyDB
add maginal Issue Un-/Subscription support
add Issue Subscribtion
* api
* layout
Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://gitea.com/gitnex/GitNex/pulls/203
Reviewed-by: M M Arif <mmarif@swatian.com>