Docs for directory data loader usage (#1016)

docs/components/data-sources/directory.mdx

@@ -0,0 +1,41 @@
+---
+title: '📁 Directory'
+---
+
+To use an entire directory as data source, just add `data_type` as `directory` and pass in the path of the local directory.
+
+### Without customization
+
+```python
+import os
+from embedchain import Pipeline as App
+
+os.environ["OPENAI_API_KEY"] = "sk-xxx"
+
+app = App()
+app.add("./elon-musk", data_type="directory")
+response = app.query("list all files")
+print(response)
+# Answer: Files are elon-musk-1.txt, elon-musk-2.pdf.
+```
+
+### Customization
+
+```python
+import os
+from embedchain import Pipeline as App
+from embedchain.loaders.directory_loader import DirectoryLoader
+
+os.environ["OPENAI_API_KEY"] = "sk-xxx"
+lconfig = {
+    "recursive": True,
+    "extensions": [".txt"]
+}
+loader = DirectoryLoader(config=lconfig)
+app = App()
+app.add("./elon-musk", loader=loader)
+response = app.query("what are all the files related to?")
+print(response)
+
+# Answer: The files are related to Elon Musk.
+```

docs/components/data-sources/overview.mdx

@@ -29,6 +29,7 @@ Embedchain comes with built-in support for various data sources. We handle the c
   <Card title="⚙️ Custom" href="/components/data-sources/custom"></Card>
   <Card title="📝 Substack" href="/components/data-sources/substack"></Card>
   <Card title="🐝 Beehiiv" href="/components/data-sources/beehiiv"></Card>
+  <Card title="📁 Directory" href="/components/data-sources/directory"></Card>
 </CardGroup>
 
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