Mlsw 10552 setup ci to build and test machine learning applications repo

[silabs-JeevanRH]

Description

This PR is to setup CI to build and test machine_learning_applications repo apps

Fixes # MLSW-10552

Type of change

Please select all the options that apply. Ideally only one should be selected.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

The goal of this task was to verify that all machine learning applications in the repository build successfully whenever any push is made. Since the CI pipeline was newly created, it was tested by pushing the updated workflow code to the repository, triggering the GitHub Actions job, and confirming that all matrix builds executed successfully end-to-end without errors, ensuring the pipeline correctly generates and compiles every ML application automatically.

Test Configuration:

• Firmware version: N/A
• Hardware: BRD2601B
• Toolchain: ARM GNU GCC 12.2.rel1
• SDKs: Simplicity sdk v2025.6.2, AI/ML extension v2.1.2

Screenshots

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[silabs-raashid]

Some work is needed on the CI job, please address those comments and we should be good to go. Marking this as "Request Changes" for now.

[silabs-raashid]

A few minor changes needed again. But we're close to the finish line.

[silabs-raashid]

Also, please resolve the conflict that this file, people_flow_counter_mls90460.slcp

[silabs-raashid]

LGTM!