Break out formatters

In the change made to move to std::format, we defined some custom type
formatters in logging.hpp. This had the unintended effect of making
all compile units pull in the majorit

Break out formatters

In the change made to move to std::format, we defined some custom type
formatters in logging.hpp. This had the unintended effect of making
all compile units pull in the majority of boost::url, and nlohmann::json
as includes.

This commit breaks out boost and json formatters into their own separate
includes.

Tested: Code compiles. Logging changes only.

Change-Id: I6a788533169f10e19130a1910cd3be0cc729b020
Signed-off-by: Ed Tanous <ed@tanous.net>

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