add badge counting good first issues (#4708)
add badge counting good first issues (#4708)

fixes  #4696

note, I know nothing about trustworthiness of this service but readme is already using it anyway, so things are not made worse by this PR
maskaravivek/apps-android-commons,domdomegg/apps-android-commons,psh/apps-android-commons,domdomegg/apps-android-commons,domdomegg/apps-android-commons,commons-app/apps-android-commons,psh/apps-android-commons,commons-app/apps-android-commons,neslihanturan/apps-android-commons,neslihanturan/apps-android-commons,maskaravivek/apps-android-commons,maskaravivek/apps-android-commons,neslihanturan/apps-android-commons,neslihanturan/apps-android-commons,domdomegg/apps-android-commons,maskaravivek/apps-android-commons,psh/apps-android-commons,commons-app/apps-android-commons,psh/apps-android-commons,commons-app/apps-android-commons,commons-app/apps-android-commons,domdomegg/apps-android-commons,maskaravivek/apps-android-commons,psh/apps-android-commons,neslihanturan/apps-android-commons