Reopen lottery 重启彩票功能

It is recommended that pancakeswap restart the lottery function, and introduce the destruction and distribution functions. Suggest:

1. Start a round of lucky draw every week.
2. 85% of the cake in the prize pool is used to reward winners, 5% of the cake in the prize pool is used to burn and the other 10% cake is used to reward to cake-bnb liquidity providers.
3. Open the prize pool of other currencies, such as bnb

建议pancakeswap重启抽奖功能，并引入销毁和分发功能。 建议： 1.每周开始一轮幸运抽奖。 2.每期cake奖池的85%用于奖励中奖者，奖池cake的5%用于燃烧，另外10%的cake用于奖励cake-bnb流动性提供者。 3.开启其他币种的奖池，比如bnb