Plugin bundle format for rustbridge

This crate provides types and utilities for creating and loading .rbp (rustbridge plugin) bundles - standardized archives containing multi-platform plugin libraries and metadata.

Bundle Structure

my-plugin-1.0.0.rbp
├── manifest.json
├── schema/
│   ├── messages.json          # JSON Schema for message types
│   └── messages.h             # C header with struct definitions
├── lib/
│   ├── linux-x86_64/
│   │   └── libmyplugin.so
│   ├── darwin-aarch64/
│   │   └── libmyplugin.dylib
│   └── windows-x86_64/
│       └── myplugin.dll
└── docs/
    └── README.md

Example

use rustbridge_bundle::{BundleBuilder, Manifest, Platform};

// Create a bundle
let manifest = Manifest::new("my-plugin", "1.0.0");
let builder = BundleBuilder::new(manifest)
    .add_library(Platform::LinuxX86_64, "target/release/libmyplugin.so")?
    .add_library(Platform::DarwinAarch64, "target/release/libmyplugin.dylib")?;

builder.write("my-plugin-1.0.0.rbp")?;
# Ok::<(), rustbridge_bundle::BundleError>(())