27 rpcresult improvements

[eigen-value]

This PR addresses a thread related concern: concurrent calls to .result

Besides it introduces a change in the API that breaks backwards compatibility, but improves readability:

// no longer
// RpcResult async_res = Bridge.call("metod", param);
// async_res.result(res);

// after this PR
RpcCall async_call = Bridge.call("metod", param);
async_call.result(res);

fix:
restores read_timeout in tcp_client

[github-actions]

Memory usage change @ 3f06c40

Board	flash	%	RAM for global variables	%
arduino:zephyr:unoq	🔺 +548 - +1044	+0.03 - +0.05	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/client flash	%	examples/client RAM for global variables	%	examples/clientSSL flash	%	examples/clientSSL RAM for global variables	%	examples/hci flash	%	examples/hci RAM for global variables	%	examples/monitor flash	%	examples/monitor RAM for global variables	%	examples/server flash	%	examples/server RAM for global variables	%	examples/simple_bridge flash	%	examples/simple_bridge RAM for global variables	%	examples/test flash	%	examples/test RAM for global variables	%	examples/udp_ntp_client flash	%	examples/udp_ntp_client RAM for global variables	%
arduino:zephyr:unoq	852	0.04	0	0.0	984	0.05	0	0.0	624	0.03	0	0.0	548	0.03	0	0.0	876	0.04	0	0.0	712	0.04	0	0.0	792	0.04	0	0.0	1044	0.05	0	0.0

Click for full report CSV

Board,examples/client<br>flash,%,examples/client<br>RAM for global variables,%,examples/clientSSL<br>flash,%,examples/clientSSL<br>RAM for global variables,%,examples/hci<br>flash,%,examples/hci<br>RAM for global variables,%,examples/monitor<br>flash,%,examples/monitor<br>RAM for global variables,%,examples/server<br>flash,%,examples/server<br>RAM for global variables,%,examples/simple_bridge<br>flash,%,examples/simple_bridge<br>RAM for global variables,%,examples/test<br>flash,%,examples/test<br>RAM for global variables,%,examples/udp_ntp_client<br>flash,%,examples/udp_ntp_client<br>RAM for global variables,%
arduino:zephyr:unoq,852,0.04,0,0.0,984,0.05,0,0.0,624,0.03,0,0.0,548,0.03,0,0.0,876,0.04,0,0.0,712,0.04,0,0.0,792,0.04,0,0.0,1044,0.05,0,0.0