Vendor wasm runtime

[jprendes]

This PR prepares hyperlight-wasm to be publishable by vendoring the dependency on wasm_runtime.

• Added a make-vendor-tar recipe in Justfile to create a vendor.tar for bundling dependencies (wasm_runtime and hyperlight_wasm_macro)
• Updated build.rs to unpack the vendor.tar file during the build process. This allows us to distribute the dependent crate as part of hyperlight-wasm
• Removed the usage of wasmtime-platform.h
• Updated Cargo.toml to include metadata required by crates.io (description, license, repository)
• Added the vendor.tar file to the include list for publication.

TODO (in another PR): Update CI workflows with the steps to publish the hyperlight-wasm crate.

• create the new branch
• crate the tarball and remove the .gitignore file
• commit changes to release branch
• verify that vendor.tar is blundled (with cargo package -p hyperlight-wasm --list)
• do the cargo publish

[ludfjig]

Looks very reasonable to me

[jsturtevant]

couple small quesitons otherwise lgtm