[BUILD-463] feat: Add method for getting note suspension states from Anki to the iframe

In the AnkiHub AI chatbot, we want to know which notes are suspended and which aren't. This way we can e.g. have a button for each note that says "Unsuspend" or "Suspend" depending on if the note is currently suspended. We need a way to get this information.

The AnkiHub AI templates will be able to use java script like this to request the suspension states:

const message = {
  message: `ankihub_get_note_suspension_states {
    "noteIds": [
      "fe9cdeaa-7363-4135-8c00-98c723a3ed5d",
      "e3c1f90d-6dc8-41a8-8155-3bf05e6ea307",
      "00000000-0000-0000-0000-000000000002"
    ]
  }`,
  sendToPython: true
};
window.parent.postMessage(message, '*');

Then they will be able to receive the result using code like this:

window.addEventListener("message", function (event) {
  const message = event.data;
  console.log("received message", message);
});

Example result:

{
    // If a note is not found in Anki, it won't be in the returned mapping.
    "noteSuspensionStates": {
         "fe9cdeaa-7363-4135-8c00-98c723a3ed5d": true,
         "e3c1f90d-6dc8-41a8-8155-3bf05e6ea307": false,
    }
}

Proposed changes

Handle get_note_suspension_states_pycmd by getting the suspension states and sending them to the iframe.
Add tests

How to reproduce

Comment out this code to make the chatbot show up for any AnkiHub deck: https://github.com/ankipalace/ankihub_addon/blob/1a8b0eb4b3c2b030b0c538c44fea8fc6014e151f/ankihub/gui/reviewer.py#L104-L107
Modify the chatbot.html template in the web app.
- Add this snippet below https://github.com/ankipalace/ankihub/blob/805a733be7c63890d6a526a74aadbc01e06b6b3c/ankihub/templates/ai/chatbot.html#L103-L104
```
const message = {
message: `ankihub_get_note_suspension_states {
// Change these to AnkiHub note ids that you have installed
"noteIds": [
  "fe9cdeaa-7363-4135-8c00-98c723a3ed5d",
  "e3c1f90d-6dc8-41a8-8155-3bf05e6ea307",
  "00000000-0000-0000-0000-000000000002"
]
}`,
sendToPython: true
};
window.parent.postMessage(message, '*');
```
- Add this snippet above https://github.com/ankipalace/ankihub/blob/805a733be7c63890d6a526a74aadbc01e06b6b3c/ankihub/templates/ai/chatbot.html#L103-L104
```
window.addEventListener("message", function (event) {
const message = event.data;
console.log("received message", message);
});
```
- This way the note suspension states will be requested when a message is sent to the chatbot. The code from the second snippet will receive the note suspension states result and log it to the console.
Enable the chatbot feature flag on your local ankihub web app
Open an ankihub note in the reviewer
Open the chatbot and send a message
Look at the console using the AnkiWebView inspector dev tool
You should see "received message" and the correct noteSuspensionStates

AnkiHubSoftware / ankihub_addon

[BUILD-463] feat: Add method for getting note suspension states from Anki to the iframe #982

Related issues

Proposed changes

How to reproduce

Codecov Report