Add new checker for XGBoost (dmlc/xgboost)

[Harishvow]

This pull request introduces a new CVE checker for XGBoost, an open-source machine learning library maintained under the dmlc/xgboost
project.

Details

Added a new file xgboost.py under cve_bin_tool/checkers/

Implemented detection logic for XGBoost binaries using:

Shared library names: libxgboost.so, libxgboost.dylib, xgboost.dll

Internal identifiers such as xgboost7DMatrix, xgboost10collective, etc.

Defined a version extraction pattern: ([0-9]+.[0-9]+.[0-9]+)

Created unit tests in test_xgboost.py to validate both detection and version extraction.

Checklist

1.Code follows the project’s style guide and includes SPDX license headers

2.Checker correctly detects XGBoost binaries

3.Tests pass successfully (pytest test/test_xgboost.py)

4.Verified functionality with a real XGBoost library binary

5.Added "xgboost" entry in init.py

Maintainer Note

This checker adds support for detecting XGBoost libraries commonly used in data science and machine learning environments.
It enables accurate CVE correlation and improves the tool’s coverage for ML related dependencies.