docs: Include more detailed instructions on excluding from common AV solutions, including macOS Gatekeeper (#84206)
Gatekeeper instructions are based on https://nexte.st/docs/installation/macos/#gatekeeper
Windows instructions are based on https://support.microsoft.com/en-us/windows/virus-and-threat-protection-in-the-windows-security-app-1362f4cd-d71a-b52a-0b66-c2820032b65e#bkmk_threat-protection-settings
<img src="https://app.graphite.dev/user-attachments/assets/b7d6f232-ed87-4245-be9e-4fe130b5dc96.png" width="600">
<img src="https://app.graphite.dev/user-attachments/assets/6ab4623f-45e7-4bb7-aca0-de0b85051715.png" width="600">