neuralnetlib 4.0.5

• fix(cosine_sim): division by zero
• refactor: remove the use of enums
• docs: huge update and new examples
• docs(readme): update hyperlinks
• feat: add SVM
• fix(Dense): bad variable init
• fix(Tokenizer): bpe tokenizing
• fix: jacobian matrix instead of approximation
• fix(AddNorm): backward pass
• ci: bump version to 4.0.4