DataStorm partial update demo

[pepone]

This PR adds a new DataStorm demo that showcase partial update feature.

The DataStorm/stock demo already shows partial updates the idea is to replace DataStorm/stock with this simpler demo.

[Copilot]

Pull Request Overview

This PR adds a new DataStorm partial update demo that demonstrates how to use partial updates to efficiently publish changes to individual fields without sending the entire data structure.

Key changes:

• New demo showing writer publishing atmospheric condition updates (temperature and humidity)
• Reader subscribes to updates and uses registered updaters to process both full and partial updates
• Uses full updates when both fields change, partial updates when only one field changes

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
cpp/DataStorm/partialUpdate/Writer.cpp	Implements writer that publishes full and partial updates for atmospheric conditions
cpp/DataStorm/partialUpdate/Reader.cpp	Implements reader that subscribes to and displays atmospheric condition updates
cpp/DataStorm/partialUpdate/README.md	Documentation explaining the demo and how to build/run it
cpp/DataStorm/partialUpdate/CMakeLists.txt	CMake build configuration for the demo
cpp/DataStorm/partialUpdate/AtmosphericConditions.ice	Slice definition for data types and update tags
cpp/DataStorm/partialUpdate/.gitignore	Git ignore file for build artifacts