fix(InputOTP): InputOTP component feature

[wangdicoder]

Summary

• Refine InputOTP behaviour to fire onChange on every value update instead of only when all cells are filled.
• Fix masked cell rendering logic and caret colour, improving UX and visual consistency.
• Update docs, examples, and add Chinese documentation & routing for InputOTP.

Details

• InputOTP now computes the previous and next values from all cells and calls onChange only when the value string actually changes.
• Masked cells now respect custom string masks while preserving the underlying value, and caret colour follows the current text colour.
• Tests updated to assert onChange is called on each intermediate input; separator demo and docs adjusted to match the new behaviour.