fix: use Qt flag_val() for PySide6 compat in IDA plugin

[BHARATH0153]

Resolves #3095

Replace direct bitwise operations on module-level Qt flag constants with flag_val() helper that extracts int values from enum members. This resolves RuntimeWarning in IDA 9.3+ where PyQt5 shim is deprecated.

• qt_compat.py: add flag_val(), fix qt_get_item_flag_tristate() to return int value using proper enum path
• item.py: use flag_val() for all flag bitwise operations
• view.py: use flag_val() for all flag bitwise operations

[x] No CHANGELOG update needed

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[github-actions]

Please add bug fixes, new features, breaking changes and anything else you think is worthwhile mentioning to the master (unreleased) section of CHANGELOG.md. If no CHANGELOG update is needed add the following to the PR description: [x] No CHANGELOG update needed

[gemini-code-assist]

Code Review

This pull request introduces compatibility fixes for Qt5 and Qt6 (PySide6) flag handling by introducing a flag_val helper function to extract raw integer values from Qt enum flags, and wrapping bitwise operations on flags with int() and flag_val(). The review feedback highlights a potential regression in qt_get_item_flag_tristate() where removing the direct check for ItemIsAutoTristate on Qt might break compatibility with certain PySide6 versions, and suggests restoring this check while wrapping all returned flags in flag_val().

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CHANGELOG updated or no update needed, thanks! 😄