HaikuDepot: Buffered Reads for JSON Parse

Reduce the number of small reads into a file
for JSON parse by buffering the data.

Change-Id: Iae8030a72daec358968cd2edf5f95510194a2f68
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7096
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

HaikuDepot: Token Based Authentication

This switches the application over from using basic
authentication to using token-based authentication in
preparation for later using Open-ID based
authentication flows. The application version is also
bumped in order that the server can detect this version
at some later date in the future when it no longer
supports basic authentication itself.

Change-Id: I7addde1d57503c58d6bcd54908f22f66830c0c59
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6944
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>