Set up cava benchmark

.gitlab-ci.yml

Cargo.lock

hercules_ir/Cargo.toml

hercules_ir/src/parse.rs

hercules_rt/src/lib.rs

hercules_samples/dot/src/main.rs

hercules_samples/matmul/src/main.rs

hercules_samples/matmul/src/matmul.hir

juno_samples/cava/Cargo.toml

juno_samples/cava/benches/cava_bench.rs

juno_samples/cava/src/cava.jn

juno_samples/cava/src/cpu.sch

juno_samples/cava/src/gpu.sch

juno_samples/cava/src/lib.rs

juno_samples/cava/src/main.rs

juno_samples/concat/src/main.rs

juno_samples/matmul/src/main.rs