feat: use curl --compressed argument if Accept-Encoding includes gzip

[sheimer]

Adds --compressed argument automatically, if header Accept-Encoding is present and includes gzip.

A new builder method builder.extras is used to add the argument.

Solves problem #435

[boltlessengineer]

I think I misunderstood about --compressed option.
This should be opt-in feature instead of opt-out.

[boltlessengineer]

@sheimer I added clients.curl.opts.set_compressed option which is false by default.
You can enable this option to set --compressed argument when Accept-Encoding header contains ”gzip”.

If you are fine with this opt-in implementation, I’ll merge the PR.

[sheimer]

I am totally fine with this opt-in option on the client! Thank you very much :)

[boltlessengineer]

Oops I messed up the branches while rebasing it. This is merged to main now.