fix: prevent ruff from pruning tool imports in main.py

[ezyang]

Stack from ghstack (oldest at bottom):

• fix: fixing type errors in the codebase #301
• codemcp-id: 301-untitled #300
• test #299
• -> fix: prevent ruff from pruning tool imports in main.py #298

Each of the tools imports in codemcp/main.py must not be pruned by ruff as they have side effects, add appropriate noqa to them

3724281  (Base revision)
HEAD     Add noqa comments to tool imports to prevent ruff from pruning them as they have side effects

codemcp-id: 299-fix-prevent-ruff-from-pruning-tool-imports-in-main