#710 Add CORE logo icon to executable builds and update README logo

[RakeshBobba03]

This PR for Issue #710 adds the CORE logo as the executable icon for PyInstaller builds and updates the README to display the CORE logo instead of the CDISC logo. The icon file (CORE_logo_sm.ico) has been added to resources/assets/ and integrated into all build configurations: Dockerfile.build, GitHub Actions workflows (build-binary.yml), and README documentation (PyInstaller commands for both Linux and Windows). The README logo at the top has been updated to use the CORE logo image (CORE_logo_sm.png). These changes ensure that future releases will display the CORE logo on Windows executables and in the repository README.

[RamilCDISC]

Could you please update the Build custom executable workflow too?

[RamilCDISC]

I ran the custom executable build workflow and downloaded the zip. The executable in the zip did not have the provided icon. You can download the zip from here https://github.com/cdisc-org/cdisc-rules-engine/actions/runs/20699099226

I tried locally too on a mac. The executables did not have the icon.

[RamilCDISC]

Could you please update the commands in readme.md to show for mac too and i ran the workflow for linux here https://github.com/cdisc-org/cdisc-rules-engine/actions/runs/20829577911

The core executable still does not show the icon. You can download the zip from the link above.

[RamilCDISC]

The PR adds core icon to the executables created through workflows and manually. The PR was validated by:

1. Ensuring all relevant workflows were updated.
2. Ensuring all documentation was updated.
3. Ensuring windows, mac and linux all were converted in updates.
4. Tested the linux executable by running build_version.yml workflow.
5. Tested mac and windows by building executables locally.

Note: For linux the icon may not be visible because file managers there typically display generic icons for executables. For mac add '--windowed' to the command to create core.app, as mac shows icon only on .app.