Add Codama IDL to program binary (#105)

* Add Codama IDL

* Add IDL to program binary

* Update dependency

* Use published crate

---------

Co-authored-by: Hardhat Chad <155858888+HardhatChad@users.noreply.github.com>

program/build.rs

@@ -0,0 +1,18 @@
+use std::env;
+use std::path::PathBuf;
+
+use solana_include_idl::compress_idl;
+
+/// Build script to compress the IDL file to a zip file when building the program.
+///
+/// The compressed IDL is then included in a separate ELF section on the program binary
+/// when the program is built.
+fn main() {
+    // Get the IDL path.
+    let idl_path = PathBuf::from("../api").join("idl.json");
+    // Compress the IDL file to a zip file.
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let dest_path = PathBuf::from(out_dir).join("codama.idl.zip");
+
+    compress_idl(&idl_path, &dest_path);
+}