[Features] Add Github and Youtube Channel loaders (#957)

Co-authored-by: Deven Patel <deven298@yahoo.com>
Co-authored-by: Deshraj Yadav <deshrajdry@gmail.com>

embedchain/chunkers/base_chunker.py

@@ -1,5 +1,8 @@
 import hashlib
 
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+
+from embedchain.config.add_config import ChunkerConfig
 from embedchain.helper.json_serializable import JSONSerializable
 from embedchain.models.data_type import DataType
 
@@ -7,7 +10,15 @@ from embedchain.models.data_type import DataType
 class BaseChunker(JSONSerializable):
     def __init__(self, text_splitter):
         """Initialize the chunker."""
-        self.text_splitter = text_splitter
+        if text_splitter is None:
+            config = ChunkerConfig(chunk_size=1000, chunk_overlap=0, length_function=len)
+            self.text_splitter = RecursiveCharacterTextSplitter(
+                chunk_size=config.chunk_size,
+                chunk_overlap=config.chunk_overlap,
+                length_function=config.length_function,
+            )
+        else:
+            self.text_splitter = text_splitter
         self.data_type = None
 
     def create_chunks(self, loader, src, app_id=None):