Merge branch 'gpu-cg' into 'main'

.gitignore

Cargo.lock

Cargo.toml

hercules_cg/Cargo.toml

hercules_cg/src/fork_tree.rs

hercules_cg/src/gpu.rs

hercules_cg/src/lib.rs

hercules_ir/src/ir.rs

hercules_opt/Cargo.toml

hercules_rt/build.rs

hercules_rt/src/lib.rs

hercules_rt/src/rtdefs.cu

hercules_samples/call/Cargo.toml

hercules_samples/call/build.rs

hercules_samples/call/src/gpu.sch

hercules_samples/ccp/Cargo.toml

hercules_samples/ccp/build.rs

hercules_samples/ccp/src/gpu.sch

hercules_samples/dot/Cargo.toml

hercules_samples/dot/build.rs