Add Node Types

Node-Types.md

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+## :brain: OCR-Based Text Extraction
+
+This node takes **base64-encoded image data** from an upstream image node (e.g. screenshot, thresholded region, etc.) and uses a backend Python API to extract readable text using an OCR engine.
+
+### :arrows_counterclockwise: Input and Timing Behavior
+
+- The node listens for **new base64 images** from upstream.
+- API calls are rate-limited using either:
+  - The **global Borealis update rate**, or
+  - A **custom rate (ms)** when enabled.
+- API requests will only be sent **if both**:
+  - Enough time has passed based on the selected timer, **and**
+  - The image has changed enough based on the **Change Detection Sensitivity** setting (0–100).
+
+### :gear: OCR Processing
+
+- OCR is handled by a **Python backend** using either:
+  - **TesseractOCR** (classic text engine)
+  - **EasyOCR** (neural network–based engine)
+- Both engines can run on **CPU or GPU**, based on your selection.
+
+### :soap: Output Sanitization
+
+- The text output can be filtered by:
+  - **Numerical Data** – Only numbers, decimals, and `%`
+  - **String Data** – Only alphabetic text
+  - **Mixed Data** – Includes both numbers, letters, and symbols (default)
+- Output is stored as a **multi-line array of strings** and displayed in a read-only text box.