Issue 86 entrypoints

[rahlk]

Symbol table has been updated to now natively capture entrypoint classes and entrypoint methods in JavaEE/JakartaEE, Spring/Springboot, Stuts, and Jaxrs.

New methods:

private static boolean isEntryPointMethod(CallableDeclaration callableDecl) {
    return isServletEntrypointMethod(callableDecl) || isJaxRsEntrypointMethod(callableDecl) || isSpringEntrypointMethod(callableDecl) | isStrutsEntryPointMethod(callableDecl);
    }

private static boolean isEntryPointClass(TypeDeclaration typeDecl) {
    return isSpringEntrypointClass(typeDecl) || isStrutsEntryPointClass(typeDecl) || isCamelEntryPointClass(typeDecl) || isJaxRSEntrypointClass(typeDecl) || isJakartaServletEntryPointClass(typeDecl);
}

(all the inner methods isServletEntrypointMethod(...) etc. have been implemented)

---

Other key changes:

• New fields in Callable and Type entities called isEntrypoint and isEntrypointClass respectively.
• New test case shouldBeAbleToGenerateAnalysisArtifactForDaytrader8() in src/test/java/com/ibm/cldk/CodeAnalyzerIntegrationTest.java to test that we can find the entrypoints in daytrader8 (which, by the way, is now available in test resources folder).
• I added a new entity called CRUDOperation that will be marked @NotImplemented. This is for future reference.