UTF-8 encoding for pyproject.toml

[bl1nch]

Description

UTF-8 encoding for pyproject.toml when parsed with flet-cli

Test Code

# Test code for the review of this PR

Type of change

• 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

Checklist

• I signed the CLA.
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing tests pass locally with my changes
• I have made corresponding changes to the documentation (if applicable)

Summary by Sourcery

Bug Fixes:

• Ensure pyproject.toml files are read with UTF-8 encoding to prevent potential encoding-related parsing issues