Fix issue 948

[aziz-mu]

This PR fixes issue #948 by adding the following functionality:

• Allowing pasting of multi-line input.
• An unfinished query can now be finished on another line, queries are only processed once they end in semicolon ';'
• Prompt change from 'kuzu>' to '..>' to show continuation of previous lines
• Allow multiple queries to be executed on the same line, as long as they are separated by semicolons. E.g. MATCH (a:person) RETURN a.fName; MATCH (a:person) RETURN *;