**Description:** <!-- Give a brief description of the issue --> Siddhi grammar need introduce escape charater for string literal, for example ``` from a select """a'bc"""" as b insert into c ``` causes a compile error **Affected Siddhi Version:** **OS, DB, other environment details and versions:** **Steps to reproduce:** <!-- We would appreciate it if you can provide a testcase :), this help us reproduce the issue much faster --> **Related Issues:** <!-- Any related issues such as sub tasks, issues reported in other repositories (e.g component repositories), similar problems, etc. -->