syntax highlighting for embedded languages (SpEL, JPQL, SQL, HQL, etc.) inside of Java editor (in Eclipse)

Support for syntax highlighting for SpEL, JPQL, SQL, HQL, etc. in Eclipse when working in the standard Java editor. The current implementation uses the semantic token support of the LSP, which works in Eclipse only if used inside the Generic Editor (the standard LSP based editor in Eclipse).

This issue is to support this mechanism for the Java editor in Eclipse as well.