code snippets for initial enet tests

1. make build scripts for server and client using g++
2. use snippets from here to make client and server

• instead of installing binaries of flatbuffer, compile the specific version using cmake -- it will generate the flatc binary. to generate the command
• usually, there is a flatbuffer submodule under third_party
• build it using these instructions
• generate code from a schema : cd schema && ./parse_schema -- this will generate *_generated.h files
• if you need a mutating flatbuffer, use the --gen-mutable flag after calling the executable
• for mutating flatbuffer, you might have to set all the fields first

• 1. robot_signal_builder (struct) : has flatbufferbuilder, enet_server, and an enet_peer
• 2. send_signal (method): to either build a new buffer or mutate an existing buffer and sennd a packet over enet
• the pointer to the robot_signal_build can be passed to other threads that can then then call the send_signal methods when needed to send the buffer to enet peers.
• these, along with enet operations, can be packaged into a network_base.h header file