### Usage Section Breakdown

1. **Convert to `camelCase`:**
   - Demonstrates how to convert a regular string or a PascalCase string to camelCase.

2. **Convert to `snake_case`:**
   - Shows how to convert different strings to snake_case, handling spaces and mixed cases.

3. **Convert to `kebab-case`:**
   - Demonstrates converting strings to kebab-case, including those with mixed cases.

4. **Truncate a String with Ellipsis:**
   - Examples of truncating strings with a default ellipsis or a custom string.

5. **Reverse the Order of Words:**
   - Shows how to reverse the order of words in a string.

6. **Strip HTML Tags:**
   - Demonstrates removing HTML tags from a string, leaving just the text content.

7. **Check if a String is a Palindrome:**
   - Examples of checking if strings are palindromes, including phrases with spaces and punctuation.

8. **Convert to Boolean:**
   - Demonstrates converting common boolean string values to actual boolean values, with handling for invalid inputs.

9. **Trim Custom Characters:**
   - Shows how to remove specific characters from the start and end of a string.

### Customization

Feel free to customize the `README.md` further by adding more examples, refining the explanations, or including any additional information relevant to your gem.

Let me know if there's anything else you'd like to add or adjust!