Add how it works

how_it_works.md

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+# How It Works
+
+TODO: Replace this with your actual content.
+
+---
+
+## Formatting Examples
+
+### Text Styles
+
+You can use **bold text**, *italic text*, or ***both together***. You can also use ~~strikethrough~~ and `inline code`.
+
+### Lists
+
+**Unordered list:**
+- First item
+- Second item
+  - Nested item
+  - Another nested item
+- Third item
+
+**Ordered list:**
+1. Step one
+2. Step two
+3. Step three
+
+### Blockquotes
+
+> This is a blockquote. Great for highlighting important information or quotes.
+>
+> It can span multiple lines.
+
+### Code Blocks
+
+```python
+# Example code with syntax highlighting
+def analyze_chords(sequence):
+    embeddings = get_embeddings(sequence)
+    return compute_score(embeddings)
+```
+
+### Tables
+
+| Chord | Function | Example Songs |
+|-------|----------|---------------|
+| I     | Tonic    | Home base     |
+| IV    | Subdominant | Building tension |
+| V     | Dominant | Wants to resolve |
+| vi    | Relative minor | Emotional depth |
+
+### Links and Images
+
+[Link to external site](https://example.com)
+
+### Math (if supported)
+
+Some Gradio themes support LaTeX: $E = mc^2$
+
+### Horizontal Rules
+
+Use `---` to create dividers like the one below the title.
+
+---
+
+### Collapsible Sections (HTML)
+
+<details>
+<summary>Click to expand</summary>
+
+Hidden content goes here. Useful for additional details that don't need to be visible by default.
+
+</details>