feat(cli): Introduce zapier canary command

[pragmatic-zac]

Adds a new command - zapier canary 🐦

This command enables users to divert a portion of traffic from one app version to a different app version for a specified amount of time.

Here's a gif of the command working...

• First, we create a canary sending 10% of traffic from version 1.0.0 to 1.0.1 for 120 seconds
• Then, we list all active canaries in a table
• Next, we delete the active canary
• Lastly, we re-list and see we've successfully deleted the canary

[standielpls]

Nice this looks so promising! And great turnaround my quick initial feedback is i was thinking more on the lines of sub-commands like zapier env:get, zapier env:set (ref)

[pragmatic-zac]

Ah gotcha, yeah I like the subcommands better! I'll swap those in instead

[pragmatic-zac]

@standielpls just updated this to use subcommands so now we have canary:create, canary:list, and canary:delete. It's ready for a look whenever you have a chance 😃