feat: Add ZRTL test framework macros

Add test framework macros to help with ZRTL plugin development:

- #[zrtl_test] attribute macro for test functions (in zrtl_macros)
- zrtl_assert! macro with enhanced error messages
- zrtl_assert_eq! and zrtl_assert_ne! for equality checks
- zrtl_assert_some! and zrtl_assert_none! for Option types
- zrtl_assert_ok! and zrtl_assert_err! for Result types

All macros are exported from the zrtl prelude for easy access.
Test framework macros provide ZRTL-prefixed output with file:line info.

Completes the final task in INTEGRATION_PLAN.md - all integration
gaps are now addressed.

Author: darmie

docs/INTEGRATION_PLAN.md

@@ -274,7 +274,7 @@ fn test_array_push() {
 | Async state machine | Medium | High | P2 | ✅ Done |
 | Cancellation | Low | Medium | P3 | ✅ Done |
 | Promise combinators | Low | Low | P3 | ✅ Done |
-| Test framework | Low | Medium | P3 | 🔲 Pending |
+| Test framework | Low | Medium | P3 | ✅ Done |
 | Native async functions (ZRTL) | High | Medium | P1 | ✅ Done |
 
 ---
@@ -306,7 +306,7 @@ fn test_array_push() {
 2. ✅ Add cancellation support (`cancel()`, `is_cancelled()`, `PromiseState::Cancelled`)
 3. ✅ Add promise combinators (`PromiseAll`, `PromiseRace`, `PromiseAllSettled`)
 4. ✅ Add native async functions to ZRTL SDK (`#[zrtl_async]` macro)
-5. 🔲 Add test framework macros
+5. ✅ Add test framework macros (`#[zrtl_test]`, `zrtl_assert_eq!`, etc.)
 
 ---
 

sdk/zrtl/Cargo.toml

@@ -11,6 +11,9 @@ categories = ["development-tools::ffi", "compilers"]
 [dependencies]
 inventory = "0.3"
 
+[dev-dependencies]
+zrtl_macros = { path = "../zrtl_macros" }
+
 [features]
 default = []
 # Enable test harness macros

sdk/zrtl/src/lib.rs

@@ -150,6 +150,14 @@ pub mod prelude {
     pub use crate::zrtl_tag;
     pub use crate::zrtl_plugin;
     pub use crate::zrtl_symbol;
+    // Test framework macros
+    pub use crate::zrtl_assert;
+    pub use crate::zrtl_assert_eq;
+    pub use crate::zrtl_assert_ne;
+    pub use crate::zrtl_assert_some;
+    pub use crate::zrtl_assert_none;
+    pub use crate::zrtl_assert_ok;
+    pub use crate::zrtl_assert_err;
 }
 
 #[cfg(test)]