Axsuarez/organization refactor

[axelsrz]

This pull request includes significant changes to streamline the build process, update dependencies, and reorganize the project structure. Key updates include simplifying the package build scripts, removing deprecated libraries, and consolidating functionality into a new microsoft-agents-activity library. Below are the most important changes grouped by theme.

Build and CI Improvements:

• Simplified the package build scripts in .azdo/ci-pr.yaml and .github/workflows/python-package.yml by removing nested directory traversal and directly building packages with pyproject.toml in the root of each library. [1] [2]
• Updated the list of wheels installed during the build process to reflect the new library structure, replacing deprecated packages with their updated counterparts. [1] [2]

Codebase Cleanup:

• Removed pyproject.toml files for deprecated libraries: microsoft-agents-client, microsoft-agents-connector, microsoft-agents-authorization, and microsoft-agents-storage. These libraries are no longer part of the project. [1] [2] [3] [4]
• Deleted unused imports and the __all__ definition from microsoft-agents-core in libraries/Core/microsoft-agents-core/microsoft/agents/core/__init__.py. This functionality has been moved to the new microsoft-agents-activity library.

Library Reorganization:

• Renamed libraries/Core/microsoft-agents-core/microsoft/agents/core/models to libraries/microsoft-agents-activity/microsoft/agents/activity and consolidated functionality such as ChannelAdapterProtocol, TurnContextProtocol, and load_configuration_from_env into the new microsoft-agents-activity library. [1] [2]
• Updated type annotations in adaptive_card_invoke_value.py to use the new microsoft.agents.activity.models namespace instead of the deprecated microsoft.agents.core.models.

Linting Configuration:

• Removed per-file ignores for specific linting rules in .flake8, as the corresponding files have been deprecated and removed.