UptimeController: unserialize probe only when necessary

cli: monitor:probe: fix tries left count in log

cli: monitor:probe: impl optional retry

composer: bump deps

view: uptime: unify the grid gap

view: provide dark theme

rebase onto lumen

provider: bring back translation, needed by error pages

trim unused bits

add readme for this project

release under MIT license

view: add a navbar, adjust cards placement

view: uptime: add status string to tooltip

view: uptime: use shapes

view: tweak up text color to be more visible

increase time slot size to 60 mins

view: display current status

view: use user-facing title if exists

add user-facing title to probeinstance

PingProbe: support ipv6