doc(validation): add JSDoc to public classes and methods
doc(validation): add JSDoc to public classes and methods

Started adding documentation to public classes & methods: validation

bfil/validation,manuel-guilbault/aurelia-validation,manuel-guilbault/aurelia-validation,ericIMT/validation,Zensavona/validation,hitesh97/validation,JeroenVinke/aurelia-validation-update,charlespockert/validation,JeroenVinke/validation,DavidBLynch/validation,DaveGee/validation,RichTeaTime/validation,PWKad/validation,milunka/validation,JeroenVinke/validation,jdanyow/validation,Bcpoole/validation,milunka/validation,JeroenVinke/validation-fix,Bcpoole/validation,bellstrand/validation,valichek/validation,RichTeaTime/validation,mbroadst/validation,DaveGee/validation,vulvulune/validation,atsu85/validation,vulvulune/validation,mbroadst/validation,PWKad/validation,santosh-suresh/validation,aurelia/validation,aurelia/validation,ericIMT/validation