Fix: Enforce strict spacing for module paths (prevent <T> :: into)

### Project version

0.5.0

### Project

lexer | parser

### What happened?

It works fine (despite the LSP error), but it should not, according to SimplicityHL version 0.4.1.

<img width="624" height="183" alt="Image" src="https://github.com/user-attachments/assets/c6d17c20-8057-4890-bc42-e6535e85eb71" />

### Minimal reproduction steps

This is shown in the screenshot.