c-api: Add a way to get type of wasmtime_module_t (#3959)

My previous PR at #3958 accidentally removed the only way to get type
information from a `wasmtime_module_t`, so this commit re-adds methods
back in to continue to be able to get import/export information from a
compiled module.

crates/c-api/include/wasmtime/module.h

@@ -59,6 +59,22 @@ WASM_API_EXTERN void wasmtime_module_delete(wasmtime_module_t *m);
  */
 WASM_API_EXTERN wasmtime_module_t *wasmtime_module_clone(wasmtime_module_t *m);
 
+/**
+ * \brief Same as #wasm_module_imports, but for #wasmtime_module_t.
+ */
+WASM_API_EXTERN void wasmtime_module_imports(
+    const wasmtime_module_t *module,
+    wasm_importtype_vec_t *out
+);
+
+/**
+ * \brief Same as #wasm_module_exports, but for #wasmtime_module_t.
+ */
+WASM_API_EXTERN void wasmtime_module_exports(
+    const wasmtime_module_t *module,
+    wasm_exporttype_vec_t *out
+);
+
 /**
  * \brief Validate a WebAssembly binary.
  *