resolc crate (#328)

- Factor the YUL crate out of `revive-solidity`.
- `revive-solidity` is in reality not a Solidity implementation but the
revive solidity compiler driver (`resolc`). By renaming we not only get
this straight but also a binary with the same name as the crate which
should be less confusing.

---------

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/resolc/build.rs

@@ -0,0 +1,7 @@
+fn main() {
+    let repo = git2::Repository::open("../..").expect("should be a repository");
+    let head = repo.head().expect("should have head");
+    let commit = head.peel_to_commit().expect("should have commit");
+    let id = &commit.id().to_string()[..7];
+    println!("cargo:rustc-env=GIT_COMMIT_HASH={id}");
+}