Merge branch 'fork_transforms' into 'main'

hercules_ir/src/def_use.rs

hercules_ir/src/ir.rs

hercules_ir/src/loops.rs

hercules_ir/src/typecheck.rs

hercules_opt/src/forkify.rs

hercules_opt/src/lib.rs

hercules_opt/src/pass.rs

hercules_samples/ccp_example.hir

hercules_samples/sum_sample.hir

hercules_tools/hercules_cpu/src/main.rs

hercules_tools/hercules_dot/src/main.rs