Fix false positives in CMake dependency parsing

[Joschi3]

Updates the CMake parser to correctly handle advanced find_package signatures. Previously, keywords like EXACT or version numbers were often mistaken for package names.
Key Changes

• Robust Parsing: Added logic to skip version numbers (e.g., 1.2.0) and flags like EXACT, MODULE, and GLOBAL.
• Better Delimiters: Now properly stops parsing arguments at OPTIONAL_COMPONENTS, NAMES, and CONFIGS (previously, only COMPONENTS was handled).
• Cleanup: Centralized constants and added type hints for better maintainability.

Example

find_package(Foo 2.0 EXACT REQUIRED)

• Before: Detected Foo, and EXACT as dependencies.
• After: Correctly detects Foo only.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 89.74359% with 4 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
package_xml_validation/helpers/cmake_parsers.py	89.74%	4 Missing ⚠️

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