Webtunnel soft release strategy

Phase 1 - Soft release

• Present WebTunnel to the relay operators meetup and get some bridge operators running it (meetup June 2023: relays#70 (closed))
• Help Bridge operators to deploy and debug their WebTunnel setup
• Ask our user support team to give to some users in censored regions (https://gitlab.torproject.org/tpo/community/support/-/issues/40117)
• Meet with AC-team to share feedback (during AC-Team weekly meeting in July)

Phase 2 - Review documentation

• Review operators feedback and move the bridge operators docs to the community portal - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/webtunnel/-/blob/main/README.md - tpo/web/community#320 (closed)

Phase 3 - Tor Browser stable

• When WebTunnel move to Tor Browser Stable, write WebTunnel users docs (TB-Manual tpo/web/manual!84 (merged), Support portal, Training materials)
• Write and publish Call for testers (like Conjure call for testers, see #88 (closed))
• Call for new WebTunnel bridge operators - relays#69