Add option to exclude ip/hostname from proxy

[corest]

Motivation for this change is very simple.
I have internal Elasticsearch, that I use as http output destination in presets.
When I use web proxy to access some of targets from different locations, I run into issue, that bbot can't write results into Elasticsearch because it tries to go via proxy.
This configuration option adds possibility to exclude listed endpoints from going via proxy.

Most of code is written by Claude. I'll gladly address any comments on how to improve this. Sorry in advance, if change doesn't follow some of contribution rules.

[TheTechromancer]

@corest thanks for the PR, this is a good feature to have.

This is pretty well implemented except for two things:

1. we should be using the radixtarget library for these lookups, which is written in rust and avoids unnecessary parsing. This is the same mechanism we use currently for targets / blacklists.
2. We need to have tests for it. Claude should be able to handle this pretty well based on the existing ones (I think we have proxy tests?).

Let me know if you want to make an update, otherwise we can do it but it may take a little longer.

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[corest]

I have read the CLA Document and I hereby sign the CLA

[corest]

recheck

[corest]

@TheTechromancer thx for a quick feedback. I updated PR addressing both comments:

1. Using radixtarget library for lookups
2. Adding tests for proxy exclusions

[liquidsec]

before we get too deep, this is still targeting stable - with 3.0 release coming soon (hopefully) if we dont rebase to 3.0 now this will just create more work later.

I'm going to go ahead and change the base, you might get some conflicts... sorry

@TheTechromancer unless you think there's another 2.x.x release you want to stick this on?

[TheTechromancer]

@corest thanks for the updates; tests look good. We're currently replacing our web library so this will be merged as soon as that's done.