muonsoft

Adds new validation constraints to the Go validation library. Use when adding a new constraint to package it, translations (message, english, russian), optional validate/is helpers, tests in test/, and examples in it/example_test.go or validate/example_test.go.

Applies Go community style from the official Code Review Comments wiki. Use when naming APIs, structuring code, or reviewing Go changes in this repository.

Port natasha/razdel behavior to Go with parity checks against upstream. Use when implementing tokenizer logic, validating edge cases, and documenting compatibility decisions.