[http] Add option to accept self signed certs

[james138138]

Describe the problem
We have use case where application needs to call self signed intranet endpoint.

Describe the solution you'd like
It would be nice to have an option to allow Tauri(reqwest) accept self signed certs for a given http scope.

Alternatives considered
Setup a proxy, or fork the http plugin.

Additional context
Just a massive thanks for all your great work. The dev experience with Tauri is amazing!

[RickeyWard]

I'd really like to see this added. It's trivial to expose a tauri:command to use reqwest but when the only reason to do so is the official plugin skipped 2 features it's just more custom code to maintain for every individual who needs it instead of one place.

bumping this