Reorganize project extras for a pip installable package

[piiq]

This PR reorganizes dependencies and updates the documentation to make the package pip-installable on more systems with less pre-requisites.

• The PR creates an optional extra out of the Portfolio Optimization menu. This will enable the terminal and the SDK to be pip-installable on most of the platforms out-of-the-box (no reliance on the presence of CMake and specific conda packages)
• The PR also moves most of the forecasting dependencies to pyproject.toml leaving only lightgbm in the conda yaml as it's the only one where arm64 binaries are not provided on pip and are extremely difficult to be built locally.
• The PR introduces the all extra that would install both the PO and the Forecasting dependencies thus enabling the functionality

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• Move optimization out to extras
• Implement safeguards that the optimization menu is inaccessible if the toolkit not installed
• Update forecasting dependencies
• Ensure tests pass
• Update relevant documentation (main README & SDK_README)
• Update test CI
• Update Installer build CI
• Update docker build dockerfile