Make Ricochet usable in Tails

Originally created by @tocard on #8173 (Redmine)

• homepage: https://github.com/ricochet-im/ricochet
• upstream ticket about integrating in Tails: https://github.com/ricochet-im/ricochet/issues/31
• upstream ticket about integrating in Whonix: https://github.com/ricochet-im/ricochet/issues/30 (including long “debate” about the control port and Tor-over-Tor)

Attachments

• ricochet.diff
• persistence-setup-ricochet.diff
• ricochet.jpeg
• ricochet-apt-config.patch
• ricochet-default-config.patch
• ricochet-onion-grater.patch
• ricochet-tmp-persistence-patch.patch

Related issues

• Related to #11826 (closed)
• Related to #8573
• Blocked by #10289 (closed)
• Blocked by #7870 (closed)