Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-pager/build.rs

@@ -0,0 +1,24 @@
+use std::process::Command;
+
+fn main() {
+    println!("cargo:rerun-if-changed=.git/HEAD");
+    println!("cargo:rerun-if-env-changed=GROK_VERSION");
+
+    let commit = Command::new("git")
+        .args(["rev-parse", "--short", "HEAD"])
+        .output()
+        .ok()
+        .filter(|o| o.status.success())
+        .and_then(|o| String::from_utf8(o.stdout).ok())
+        .map(|s| s.trim().to_string())
+        .unwrap_or_else(|| "unknown".to_string());
+
+    let version = std::env::var("GROK_VERSION")
+        .or_else(|_| std::env::var("CARGO_PKG_VERSION"))
+        .unwrap_or_else(|_| "0.0.0".to_string());
+
+    println!(
+        "cargo:rustc-env=VERSION_WITH_COMMIT={} ({})",
+        version, commit
+    );
+}