refactor instruction class and share it with assembler/disassembler/linker

[clairechingching]

No description provided.

[daog1]

Bro, I tried it, it wouldn't compile straight away. I had to make some adjustments before it worked.
Clone the repository https://github.com/blueshift-gg/sbpf to my local machine.
cargo.toml
`[dependencies]

sbpf-assembler = { path = "../sbpf/crates/assembler" }
sbpf-common = { path = "../sbpf/crates/common" }`

src/byteparser.rs
use sbpf_assembler::parser::Token;

[clairechingching]

@daog1 hey really sorry we've been going through a major refactoring on sbpf for past 2-3 weeks and are still in the process of wrapping things up (very close tho!) things will be more stabilized by the end of this week