[eppp]: Add wifi-connectivity example#481

Draft

david-cermak wants to merge 14 commits intoespressif:masterfrom david-cermak:feat/eppp_rpc_example

+3,556-1

Commits on Jan 3, 2024

fix(eppp_link): Added test-app with server and client on one ESP
david-cermak
committed

Commits on Jan 4, 2024

fix(eppp_link): Unit test which pings netifs via uarts on one ESP32
david-cermak
committed

Commits on Jan 5, 2024

Commits on Jan 9, 2024

fix(eppp_link): Per review comments
david-cermak
committed

Commits on Jan 10, 2024

feat(eppp_link): Added new RPC example
david-cermak
committed

Commits on Jan 12, 2024

Commits on Feb 13, 2024

fix(eppp_link): Minor cleanup
david-cermak
committed