Minor reorganization

[VisLab]

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[Copilot]

Pull request overview

This pull request performs a minor reorganization of the codebase, focusing on improving module naming clarity and removing deprecated backward-compatibility code. The main change renames hed_script_util.py to schema_script_util.py to better reflect its purpose as a collection of schema-specific utilities. The PR also removes an unused backward-compatibility shim and cleans up obsolete commented code, while adding comprehensive documentation for schema validation features.

Changes:

• Renamed hed/scripts/hed_script_util.py to hed/scripts/schema_script_util.py for clearer naming
• Removed deprecated backward-compatibility shim hed/schema/schema_validation_util.py
• Enhanced user documentation with new schema validation section and restructured content

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
hed/scripts/schema_script_util.py	New file (renamed from hed_script_util.py) containing schema utility functions
tests/scripts/test_script_util.py	Updated import to use new module name schema_script_util
tests/scripts/test_hed_convert_schema.py	Updated import to use new module name schema_script_util
hed/scripts/validate_schemas.py	Updated import to use new module name schema_script_util
hed/scripts/hed_convert_schema.py	Updated import to use new module name schema_script_util
hed/scripts/add_hed_ids.py	Updated import to use new module name schema_script_util
hed/validator/util/class_util.py	Removed obsolete commented code
hed/schema/schema_validation_util.py	Removed deprecated backward-compatibility shim (no longer referenced)
docs/user_guide.md	Restructured installation and usage sections, added comprehensive schema validation documentation

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