Issue Description:

drools-lsp developed a new parse based on antlr4. It passes most of tests in MiscDRLParserTest but it should still have unimplemented parts. In order to proceed the development, migrate the new drools-lsp parser into drools as experiment.

Acceptance Criteria:

• Create a development branch to migrate the new parser
• Run unit tests
• Check failed test cases
• Based on the failed test cases, add more tests in MiscDRLParserTest (or create a new test class)