feat: initial C++ support using standalone ANTLR scanner

[Ndugu2]

Goal
This PR introduces initial support for C/C++ cryptographic detection, resolving Issue #374.

Implementation Details

• Standalone Scanner**: Implemented a C++ sensor using standard ANTLR4 grammars (C++14), allowing for AST-based scanning without dependency on closed-source plugins.
• Detection Engine**: Added C++ specific translation and detection logic in the engine module.
• OpenSSL Rules**: Included an initial set of detection rules for the OpenSSL EVP API.
• Automated Source Generation**: Configured the antlr4-maven-plugin to generate parser classes at build-time. This PR correctly omits the massive generated Java files, keeping the repository hygiene high.

Cleanup & Hygiene

• This PR branch was cleaned to exclude unrelated C# scaffolding and binary artifacts (maven_fast/).
• Only source files and grammars are included.

Verification

• Includes OsslEvpRuleTest.java as a placeholder for architectural verification.
• To verify fully, run mvn clean install to ensure grammars compile and the module integrates correctly.

Fixes #374

[san-zrl]

Hi @Ndugu2,

Thank you for your PR and for the time and effort you put into contributing to CBOMkit—we truly appreciate your interest.

You may have noticed that we are already working on adding C/C++ support to sonar-cryptography in PR #377. This approach differs from yours, as it relies on Sonar’s native C/C++ support package rather than ANTLR, similar to how the existing Java module is implemented.

Work on PR #377 is already quite advanced, and at this stage we are leaning toward this approach because we expect it to provide stronger support for cross-file symbol tracing through the Sonar infrastructure.

That said, we will keep your PR open for now until a final decision is made.