Added README.md

Author: Dilmi Wickramanayake

examples/nidaqmx_analog_input_filtering/README.md

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+Prerequisites 
+===============
+Requires a Physical or Simulated Device. Refer to the [Getting Started Section](https://github.com/ni/nidaqmx-python/blob/master/README.rst) to learn how to create a simulated device. 
+## Sample
+
+This is a nipanel example that displays an interactive Streamlit app and updates and fetches data from device.
+
+### Feature
+
+Script demonstrates analog input data getting continuously acquired, and being filtered. 
+- Supports various data types
+
+### Required Software
+
+- Python 3.9 or later
+
+### Usage
+
+Run `poetry run examples/nidaqmx_analog_input_filtering/nidaqmx_analog_input_filtering.py`
+