reorg + update docs with new paths

integration/gemma-runner/src/main.rs

@@ -0,0 +1,17 @@
+#[cfg(feature = "accelerate")]
+extern crate accelerate_src;
+#[cfg(feature = "mkl")]
+extern crate intel_mkl_src;
+mod gemma_api;
+mod gemma_cli;
+
+use anyhow::Error;
+use clap::{Parser, ValueEnum};
+
+use crate::gemma_cli::run_cli;
+use std::io::Write;
+
+/// just a placeholder, not used for anything
+fn main() -> std::result::Result<(), Error> {
+    run_cli()
+}