Refactor for additional socktop connector library

- socktop connector allows you to communicate with socktop agent directly from you code without needing to implement the agent API directly.
- will also be used for non tui implementation of "socktop collector" in the future.
- moved to rust 2024 to take advantage of some new features that helped with refactor.
- fixed everything that exploded with update.
- added rust docs for lib.

socktop_agent/build.rs

@@ -1,13 +1,13 @@
 fn main() {
     // Vendored protoc for reproducible builds
     let protoc = protoc_bin_vendored::protoc_bin_path().expect("protoc");
-    std::env::set_var("PROTOC", &protoc);
 
     println!("cargo:rerun-if-changed=proto/processes.proto");
 
     // Compile protobuf definitions for processes
     let mut cfg = prost_build::Config::new();
     cfg.out_dir(std::env::var("OUT_DIR").unwrap());
+    cfg.protoc_executable(protoc); // Use the vendored protoc directly
     // Use local path (ensures file is inside published crate tarball)
     cfg.compile_protos(&["proto/processes.proto"], &["proto"]) // relative to CARGO_MANIFEST_DIR
         .expect("compile protos");