feat: Add ZPack packaging, ZRTL plugin system, and comprehensive documentation

- Add ZPack format for JIT-mode distribution (bytecode + dynamic libs)
- Add ZRTL (Zyntax Runtime Library) plugin system for runtime symbols
- Add SDK with zrtl_macros crate for Rust plugin development
- Add C SDK header (zrtl.h) for native runtime development
- Add --pack flag for JIT mode with ZPack archives
- Add --lib flag for AOT mode with static library linking
- Add automatic library path resolution for standard locations
- Add book chapters:
  - Chapter 10: Packaging & Distribution
  - Chapter 11: HIR Builder
- Add import resolver infrastructure
- Add FoldPostfix command and Haxe for-range loops
- Add instance method compilation support
- Improve typed AST with additional node types

Author: darmie

Cargo.toml

@@ -1,6 +1,6 @@
 [workspace]
 resolver = "2"
-members = ["crates/typed_ast", "crates/compiler", "crates/whirlwind_adapter", "crates/zyntax_cli", "crates/runtime", "crates/zyntax_plugin_macros", "crates/zyn_peg"]
+members = ["crates/typed_ast", "crates/compiler", "crates/whirlwind_adapter", "crates/zyntax_cli", "crates/runtime", "crates/zyntax_plugin_macros", "crates/zyn_peg", "crates/haxe_zyntax_runtime"]
 
 
 [workspace.dependencies]