Update build process

[malensek]

While we added some of the necessary flags for protobufs in the lecture video, we also need to:

• use protoc to generate code based on our proto file
• have the output file (generated code) depend on the previous step to ensure it gets built first
• have the server build depend on the generated code

So the end result is trying to build the server will trigger those earlier steps first so there are no compilation / link issues.

For now, until #56 is resolved, this could use an empty proto file.

While editing the build process, we should also have an option to build with the static analysis options we used in class:

-fanalyzer
-fsanitize=address
-fsanitize=leak
-fsanitize=undefined

[ishiekaur]

Key changes to the Makefile:

• Added a STATIC_ANALYSIS option that can be enabled with make STATIC_ANALYSIS=1
• Fixed the protobuf generation rule to output both .c and .h files in one step
• Made sure the dependency chain is correct: proto file → generated code → object files → final binary
• Fixed the order of compiler and linker flags in the linking step=
• Added the generated protobuf files to the clean target