Add documentation and update tests for wildcard support

Co-authored-by: joocer <[email protected]>

Author: Copilot

README.md

@@ -201,6 +201,37 @@ _this example requires a data file, [space_missions.parquet](https://storage.goo
 
 </details>
 
+<details>
+<summary>Query Multiple Files with Wildcards</summary>
+
+In this example, we are querying multiple files using wildcard patterns. Opteryx supports `*` (any characters), `?` (single character), and `[range]` patterns in file paths.
+
+~~~python
+# Import the Opteryx query engine.
+import opteryx
+
+# Execute a SQL query to select data from all parquet files in a directory.
+# The wildcard '*' matches any characters in the filename.
+result = opteryx.query("SELECT * FROM 'data/*.parquet' LIMIT 10;")
+
+# Display the result.
+result.head()
+~~~
+
+You can also use more specific patterns:
+
+~~~python
+# Query files matching a range pattern, e.g., file1.parquet through file9.parquet
+result = opteryx.query("SELECT COUNT(*) FROM 'data/file[1-9].parquet';")
+
+# Query files with specific naming patterns
+result = opteryx.query("SELECT * FROM 'logs/2024-01-*.jsonl';")
+~~~
+
+_Wildcards work with all supported file formats (Parquet, JSONL, CSV, etc.) and prevent path traversal for security._
+
+</details>
+
 <details>
 <summary>Query Data in SQLite</summary>
 

tests/unit/connectors/__init__.py

@@ -0,0 +1 @@
+# Test module for connectors

tests/unit/connectors/test_wildcard_paths.py

@@ -40,7 +40,7 @@ def test_wildcard_no_matches():
     stats = MockStatistics()
 
     with pytest.raises(DatasetNotFoundError):
-        FileConnector(dataset="/nonexistent/path/*.parquet", statistics=stats)
+        FileConnector(dataset="nonexistent/path/*.parquet", statistics=stats)
 
 
 def test_path_traversal_protection():