Bootstrap geth Rust workspace

crates/geth-testkit/src/lib.rs

@@ -0,0 +1,14 @@
+use tempfile::TempDir;
+
+pub struct TestHome {
+    _dir: TempDir,
+    pub paths: geth_config::GethPaths,
+}
+
+impl TestHome {
+    pub fn new() -> std::io::Result<Self> {
+        let dir = tempfile::tempdir()?;
+        let paths = geth_config::GethPaths::from_home(dir.path());
+        Ok(Self { _dir: dir, paths })
+    }
+}