Related to #13310 and #13304 this adds two ways to enable script
execution in `fleetd` (the orbit component)
- By building a package with `--enable-scripts`
- By providing a setting via a configuration profile (macOS only)
Due to how the profile assignment works, this change automatically
updates the `com.fleetdm.fleetd.config` for hosts that already have the
profile installed.
> [!NOTE]
> Documentation is in
[#13577](https://github.com/fleetdm/fleet/pull/13577) to decouple
reviews.
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