docs: Add captions to ToCs
docs: Add captions to ToCs

(cherry picked from commit 25e612876cd2a5ffdf8be9061d87e74b6b37352f)

diandiankan/mopidy,ali/mopidy,jmarsik/mopidy,diandiankan/mopidy,vrs01/mopidy,ali/mopidy,bacontext/mopidy,ZenithDK/mopidy,jodal/mopidy,vrs01/mopidy,bacontext/mopidy,swak/mopidy,mopidy/mopidy,bacontext/mopidy,tkem/mopidy,bacontext/mopidy,jodal/mopidy,ali/mopidy,kingosticks/mopidy,mokieyue/mopidy,swak/mopidy,jcass77/mopidy,adamcik/mopidy,hkariti/mopidy,swak/mopidy,diandiankan/mopidy,ali/mopidy,kingosticks/mopidy,tkem/mopidy,quartz55/mopidy,pacificIT/mopidy,jodal/mopidy,quartz55/mopidy,tkem/mopidy,mopidy/mopidy,hkariti/mopidy,ZenithDK/mopidy,tkem/mopidy,vrs01/mopidy,pacificIT/mopidy,mokieyue/mopidy,vrs01/mopidy,jmarsik/mopidy,jcass77/mopidy,mokieyue/mopidy,quartz55/mopidy,diandiankan/mopidy,hkariti/mopidy,swak/mopidy,mokieyue/mopidy,jmarsik/mopidy,pacificIT/mopidy,mopidy/mopidy,jcass77/mopidy,adamcik/mopidy,pacificIT/mopidy,kingosticks/mopidy,ZenithDK/mopidy,hkariti/mopidy,adamcik/mopidy,ZenithDK/mopidy,quartz55/mopidy,jmarsik/mopidy