Update overview.md to match the current codebase

[Suylang]

Description

Overview.md's IDE architectural description has been updated to reflect the current codebase structure and accurate file responsibilities. The documentation is now more accurate and clear, making it easier for developers to comprehend the system modules, execution environment, and startup procedure. There weren't any modifications made to the functional code.

Fixes # (issue)

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)
• Documentation (update or new)

How Has This Been Tested?

Manually reviewed updated documentation against the current project file structure and verified correctness by cross-checking with the codebase.

Testing Checklist

• Tested in latest Chrome
• Tested in latest Safari
• Tested in latest Firefox

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have requested a review from ... on the Pull Request