repl: better handling of recoverable errors

Better handling of recoverable errors in REPL module

Below syntax errors are handled without force .break/clear

• Unexpected Token (prefix errors)
• missing ) after argument list

In the multiline expression, recoverable errors are truly recoverable, otherwise syntax error will be thrown.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

repl