Add indication of fields validity

[yfuks]

Par exemple : realname should be between 2-20 carac etcc..

• [x] realname
• [x] website
• [x] location
• [x] bio
• [x] pour les rooms

[ylastapis]

Group --> waiting #174

• [ ] passwordPattern = /(.{4,255})$/i; --> available soon
• [x] description: 200 cars max
• [x] disclaimer: 200 cars max
• [x] website: valid website & 255 cars max

Room

• [x] roomNamePattern: /^[-a-z0-9_]{2,15}$/i,
• [x] roomTopicPattern: /^.{0,512}$/i,
• [ ] passwordPattern = /(.{4,255})$/i; access is not implemented yet
• [x] description: 200 cars max
• [ ] disclaimer: 200 cars max access is not implemented yet
• [x] website: valid website & 255 cars max

User

• [ ] userUsernamePattern : /^[-a-z0-9._]{2,15}$/i, cannot change username once choosen
• [x] userRealnamePattern : /^[-a-z0-9 \u00C0-\u00D6]{2,20}$/i,
• [x] Bio : 200 cars max
• [x] Location: 70 cars max
• [x] website: valid website & 255 cars max