Improve Organization pages

[Te-k]

Is your feature request related to a problem? Please describe.

Today there is little information about organisations, which make it harder for people to have information on who started a petition.

Describe the solution you'd like

Store more information from organisations :

• Website url
• Social media accounts
• logo
• Description
• Maybe some custom colors ?

And add all this on both the org_profile page and the petitions of this organisation.