dillon1000/react

Revamp compilation modes

We currently have multiple flags for targeting which functions to compile, but 
they are actually mutually exclusive. This PR consolidates to a single 
`compilationMode: 'annotation' | 'infer' | 'all'` flag: 

* Annotation compiles only functions that explicitly opt-in with "use forget" 

* Infer compiles explicitly opted-in functions (via "use forget") as well as any 
known/inferred components or hooks: 

* Component declarations 

* Component or hook-like functions (same rules as the ESLint plugin but with an 
extra check for whether it uses JSX or calls a hook) 

* All compiles all top-level functions. We should get rid of this in a follow-up 
and make tests use infer mode by default, and add explicit opt-ins where 
necessary. 

In all modes, "use no forget" always takes precedence and can be used to 
opt-out. The default mode is now "infer".