fix: remove unused import 'main' from mempalace/__init__.py

Removed the 'main' import from `mempalace/__init__.py` and updated
`pyproject.toml` to point the script entry point directly to
`mempalace.cli:main`. This ensures the CLI remains functional while
improving code hygiene.

Co-authored-by: igorls <4753812+igorls@users.noreply.github.com>

pyproject.toml

@@ -35,7 +35,7 @@ Repository = "https://github.com/milla-jovovich/mempalace"
 "Bug Tracker" = "https://github.com/milla-jovovich/mempalace/issues"
 
 [project.scripts]
-mempalace = "mempalace:main"
+mempalace = "mempalace.cli:main"
 
 [project.optional-dependencies]
 dev = ["pytest>=7.0", "pytest-cov>=4.0", "ruff>=0.4.0", "psutil>=5.9"]