New/quoteexactamount additional optimizations

[sentientforest]

Implement swap step performance enhancements:

2. **Add a zero-liquidity fast-forward** — When `liquidity=0` and `amountIn=0`, skip directly to the next initialized tick across multiple words instead of one word at a time
3. **Add a liquidity guard in computeSwapStep** — Early return or error when `liquidity=0` rather than silently returning zeros
4. **Fix the typo** — `intialized` → `initialized` in `tick.helper.ts:124`