Allow air to run without go/bin

[jonyen]

When running air, we check to ensure that go/bin is in the path.

Testing steps:

1. Remove /go/bin from PATH
2. Verify that task dev still works

[dankinder]

Thanks Jon. I'd actually prefer we not try to enforce that go/bin is in the user's path with every command we want to run, because it adds those ugly exports all over the Taskfile and is unnecessary for most users.

How about after the go install ...air@v1.52.2 command we check if air is now executable, and if $(command -v air) is still false, we issue a warning like "WARNING: Attempted to go install the air command, but it still couldn't be found; to fix try adding ~/bin/go to your PATH like so: go env GOPATH >> .bashrc"

We'd still move on with the rest of the install process.

[jonyen]

Sounds good, added a warning. .zshrc is the default for modern Macs now

[dankinder]

Do we still need this?

[jonyen]

We can take this out

[dankinder]

Seems like an unintentional change?

[jonyen]

Yeah, not needed.