Draft implementation of basic data flow analysis

[stravant]

Implement basic data flow analysis, showing known values in place of registers where we have more information about the contents of the register available.

• Currently implemented for PPC assembly, but designed the approach in a way that other Arch impls could implement it as well.
• Shows float / double values point values.
• Shows parameters
• Includes checkbox for setting to toggle between raw assembly and assembly with known data flow values swapped in.

Still needs a lot of cleanup / work. Looking for UX and architectural confirmation before I do that additional work.

Note: This is my first time implementing non-toy code in Rust, open to significantly changing the approach if I'm not following some conventions / design intent correctly here.