Minimum valid addLiquidity is 1% of initial liquidity

[chimera-defi]

While attempting to add a gracefulShutdown feature that refunds LPs
chimera-defi@27f6deb#diff-7f94b9d71a038c3284e906e7b47d9c8fc17c10966744f507f29f4f21ef9741b7R417

I noticed that if the second user deposits 0.1% of the initial LP funds or less, removeLiquidity does not return anything.
A safe value seems to be 1% where the user still gets a refund.
Just wanted to make a note of that upstream here.