feat: Flag uses of "worst" where "worse" was intended

This is very common among non-native English speakers who haven't mastered comparative vs superlative adjectives, especially when the two sound so similar:

- **worst** than → **worse** than
- much **worst** → much **worse**

Here are examples I've found in the wild:
- Inflation becomes **worst and worst** ... → Inflation becomes **worse and worse** ...