Add tensorlake CLI alias and sync CLI version

[diptanu]

Summary

• add a tensorlake CLI binary alias alongside existing tl
• keep both binaries using the same implementation via src/tensorlake.rs
• align tensorlake-cli crate version with pyproject.toml (0.4.6)

Validation

• cargo check -p tensorlake-cli --bin tl --bin tensorlake
• cargo run -p tensorlake-cli --bin tl -- --version -> tl 0.4.6
• cargo run -p tensorlake-cli --bin tensorlake -- --version -> tl 0.4.6
• fresh venv install: pip install . exposes both tl and tensorlake executables