Add compiler driver testing CLI

[0xGeorgii]

• infc ~/path_to_spec.inf --lex directs to run the lexer, but stops before parsing
• ... --parse directs to run lexer and parser, but stops before wasm generation
• ... --codegen directs to perform lexing, parsing, and wasm generation, but stops before rocq emission

None of these should produce any output files, and all should terminate with an exit code 0 if they don't hit any errors. In case of hitting errors, they should be reported to stderr and terminate with an appropriate exit code (TBD: define exit code tables).

In addition

• ... -s emits wasm file

[0xGeorgii]

Partially implemented in #28. Will revisit it later