Add a stream2_from_string() (mostly for wasm)

src/ifcopenshell-python/ifcopenshell/__init__.py

@@ -301,10 +301,10 @@ def stream2(path: Union[Path, str]):
     as a dictionary.
 
     Args:
-        path (Union[Path, str]): _description_
+        path (Union[Path, str]): input file path
 
     Yields:
-        _type_: _description_
+        dict: entity instance dictionaries
     """
     streamer = ifcopenshell_wrapper.InstanceStreamer(str(path))
     while streamer:
@@ -312,6 +312,22 @@ def stream2(path: Union[Path, str]):
             yield inst
 
 
+def stream2_from_string(data: str):
+    """Streams the content of a file path from string, yielding each instance
+    as a dictionary.
+
+    Args:
+        data (str): input data
+
+    Yields:
+        dict: entity instance dictionaries
+    """
+    streamer = ifcopenshell_wrapper.stream_from_string(data)
+    while streamer:
+        if inst := streamer.read_instance_py():
+            yield inst
+
+
 def convert_path_to_rocksdb(ifcspf_path: Union[Path, str], rocksdb_path: Union[Path, str]):
     """Converts an IFC-SPF file on disk to the IfcOpenShell-specific
     RocksDB encoding. RocksDB is an embedded key-value store that allows