Set +x for __main__ entrypoints and remove unused shebangs

[polyfloyd]

Small adjustment. A shebang is not used if the file is not executable. This change removes the shebang from non-entrypoints and makes the files that are entrypoints executable.

Summary by Sourcery

Remove unnecessary shebang lines from library modules and set the executable bit on Python entrypoint scripts

Enhancements:

• Strip shebang lines from non-entrypoint source files
• Enable execute permission (+x) on modules with main entrypoints

[sourcery-ai]

Reviewer's Guide

This PR standardizes shebang usage by removing unnecessary shebang lines from library modules and marking true entry-point scripts as executable (chmod +x).

File-Level Changes

Change	Details	Files
Removed unused shebang lines from non-entry modules	Strip "#!/usr/bin/env python3" from top of files without a main block Update file headers to remove now-redundant executable markers	src/emhass/machine_learning_forecaster.py src/emhass/optimization.py src/emhass/utils.py
Made entry-point scripts executable	Ensure scripts with main blocks retain shebangs Change file mode to +x so they can be run directly	src/emhass/forecast.py src/emhass/retrieve_hass.py

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sourcery-ai]

Hey @polyfloyd - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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