feat(rust): disable HTTP caching

[imobachgs]

Problem

When connecting to the same machine (e.g. a server) but using a different version of Agama (e.g., you are using a new build), the browser cache could display the old UI.

Solution

Disable the cache by setting the no-store value. In the future, we could prefer using a different mechanism, like the Etag header.

Testing

• Tested manually

[ancorgs]

To me, using etag (eg. based on the machine-id) sounds like the right approach.

I kind of fear no-store could be too much and cause some performance problems.

Buy I'm pretty clueless so it's pure speculation on my side.

[imobachgs]

I do not expect any performance problem to be honest. You only need to load the code once (the HTML and a big JavaScript file).

Reloading the app is the only case but, for Agama 11, I would say it is good enough.

[imobachgs]

And it is not enough with setting the etag value only. So for Agama 11 I prefer the "conservative" solution. However, I will do some tests.

[ancorgs]

LGTM, despite the weird error on CI, which doesn't look related to this PR.