Add inchi as a devDependency to perry and use it for validating Inchi string and Inchi key in Inchi dictionary

[maneetgoyal]

• [ ] Methods to be used for validation:

• CheckINCHIKey

• CheckINCHI

Not a part of milestone 1

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• [ ] Manually check the validity of these InChi string and key via Pubchem

[qur786]

Ok sir