feature: add subscription type, changelog, and linter

feature: add subscription type, changelog, and linter (#1)

* feature: add subscription type, changelog, and linter

* bump: changelog

* feature: add new function to only get the operation name

* refactor: use strconv to parse int to string

implement naive variable parser

v1.1.0

remove uneeded log

v1.0.0

• able to parse simple operation
• able to parse selection recursively
• able to parse parameters