Enforce Site Isolation

[NDevTK]

• I agree to license my contribution under LGPL-3.0 or my contribution is from another project with a license compatible with LGPL-3.0

To test this pull request, follow the instructions in the wiki.

---

Blocked on ajayyy/maze-utils#5 HTTP Request Proxy
🦆

chrome.runtime.sendMessage({
    "message": "registerContentScript",
    "id": "duck",
    "allFrames": true,
    "js": [
        {
            "code": "alert('🦆')"
        }
    ],
    "css": [],
    "matches": [
        "https://sponsor.ajay.app/*"
    ]
});