Update e2b core package

[jakubno]

Note

Bumps e2b dependency from 2.3.0 to 2.6.0 in both JS and Python SDKs and updates lockfiles.

• Dependencies:
  • Upgrade e2b from ^2.3.0 to ^2.6.0.
    • JS: packages/js-sdk/package.json
    • Python: packages/python-sdk/pyproject.toml, packages/python-sdk/poetry.lock
• Lockfiles:
  • Update pnpm-lock.yaml and Python poetry.lock entries to reflect e2b@2.6.0.

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