Update docs for the 0.2.0 release (#58)

### Motivation

We made a few breaking changes, so let's get 0.2.0 out.

### Modifications

Updated docs to refer to a 0.2.0 release instead of 0.1.0.

### Result

Accurate docs.

### Test Plan

N/A

Use the general runner pool for PRs (#2)

### Motivation

PRs should use the "general" macOS runner pool to ensure less waiting,
"nightly" is meant to be for scheduled jobs only.

### Modifications

Updated from "nightly" to "general" pool for PRs.

### Result

Less waiting on macOS CI in PRs.

### Test Plan

N/A - this issue happened due to me copy-pasting the GH workflow YAML
from the 'main' workflow.

Hello, Swift Configuration