[Banner] Add Banner to update users on transfer downtime due to upgrade

[mliu-xlabs]

Task Add a banners that will update the user of downtime due to a guardian network upgrade.

• banner describing upcoming downtime
• banner during downtime
• banner after downtime is complete

Acceptance Criteria

• heads up message

  • 08/18/23 8PM UTC ⚠️ Wormhole Upgrade Approaching - Expect Temporary Downtime: A required upgrade is being coordinated and executed by the network of Wormhole Guardian (validator) nodes to add Gateway to the Wormhole stack. Please take note that token bridging will pause for several hours on Monday, August 21 around 6AM UTC during the upgrade.

• downtime message

  • 08/21/23 6AM UTC ⛔️ Wormhole Upgrade In Progress - Temporary Downtime In Effect: A required upgrade is being executed by the network of Wormhole Guardian (validator) nodes to add Gateway to the Wormhole stack. Token bridging is currently paused. Monitor the live status of the upgrade here.

• uptime message

  • 08/21/23 9AM UTC keep banner up for 24 hours ✅ Wormhole Upgrade Completed - Back Online: A required upgrade was completed by the network of Wormhole Guardian (validator) nodes to add Gateway to the Wormhole stack. Token bridging is now live.

• Longer than Expected Message (just in case)

  • Date and Time TBD ⛔️Wormhole Upgrade In Progress - Temporary Downtime In Effect:** The upgrade is resulting in slightly longer than expected downtimes, please continue to be patient while the Guardian network completes this network upgrade.

[mliu-xlabs]

Waiting for designs and confirmation of downtime

[mliu-xlabs]

for the last banner, we should monitor to make sure that transfers are live

[Gpluv]

@mliu-xlabs @raop155 @giulianoconti Design Here