Fix float and integer check for metaplex share allocation

[anselsol]

Our 4000$ honest mistake

Yesterday we used the Fair Launch Protocol for the first time to launch our collection (I'm a developer on several other projects, but they didn't use the FLP). And it did go well up until we got to mint.

We got the error where it says that the creators shares must equal 100 for the metadata to be valid and that no one will be able to mint.

It's tough ! Because it was the first time we used multiple wallets and had to split the costs (and we had to change it last minute).

It looked like this :

"creators":[
    {"address":"_redacted_", "share":16.5},
    {"address":"_redacted_", "share":16.5},
    {"address":"_redacted_", "share":16.5},
    {"address":"_redacted_", "share":50.5}
]

The problem was that the verify_token_metadata returned no error when there actually was one. When we checked the rust code, we realised that the share number had to be of u8 type. No floaties allowed in there !

This PR is fixing this by throwing an error when the numbers in creators[].share are not integers. I hope this will help someone avoid this mistake in the future.

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litjesus – ./js/packages/fair-launch

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✅ Preview: https://litjesus-git-fork-arcnft-our-4000-mistake-metaplex.vercel.app

ono-store – ./js

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✅ Preview: Failed

rnftz – ./js/packages/fair-launch

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✅ Preview: https://rnftz-git-fork-arcnft-our-4000-mistake-metaplex.vercel.app

fair-launch – ./js/packages/fair-launch

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✅ Preview: https://fair-launch-git-fork-arcnft-our-4000-mistake-metaplex.vercel.app

helium – ./js

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nephrops – ./js

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pinkskull – ./js

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squidstuff – ./js

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