refactor: remove more test apps and replace with minimal-examples

CMakeLists.txt

cmake/lws_config.h.in

lib/context.c

lib/event-libs/README.md

lib/event-libs/libev/libev.c

lib/event-libs/libev/private.h

lib/event-libs/libevent/libevent.c

lib/event-libs/libevent/private.h

lib/event-libs/libuv/libuv.c

lib/event-libs/libuv/private.h

lib/event-libs/poll/poll.c

lib/event-libs/poll/private.h

lib/libwebsockets.c

lib/libwebsockets.h

lib/private-libwebsockets.h

lib/service.c

minimal-examples/http-server/README.md

...erver/minimal-http-server-eventlib-foreign/CMakeLists.txt

...ttp-server/minimal-http-server-eventlib-foreign/README.md

.../minimal-http-server-eventlib-foreign/localhost-100y.cert