feat: Follow redirect with gun client

[speeddragon]

The goal for this functionality is to provide the gun HTTP client with the following redirect functionality, we might in some requests.

This is disabled by default and can be enabled by setting follow_redirects to true.

routes = [#{
    <<"template">> => <<"/raw">>,
    <<"node">> =>
        #{
            <<"prefix">> => <<"https://arweave.net">>,
            <<"opts">> => #{ http_client => gun, protocol => http2, <<"follow_redirect">> => true}
        }
}]

or via a config flat file:

routes/1/node/opts/ao-types: follow_redirect=atom
routes/1/node/opts/follow_redirect: true

For testing, I used the mock server in this PR.

Actions

• To be tested with the main use case.

[speeddragon]

I'm not sure if this is the right way to keep track of how many redirects we had, but to do it in another way, I would have to change the code more deeply.

[noahlevenson]

Not sure if relevant, but we may have attempted similar functionality here: #477

(That PR, #477, was merged into #481)

[speeddragon]

Thanks! After reviewing the code, it appears to be better implemented than this PR. I will close this (but keep the branch for now, in case I need this code for testing).