fix(engine): fix incorrect is_head for remote references

fix(parser): fix incorrect table fields on select statement

chore(gh): fix error on release action

fix(chore): fix errors on ast, cli and parser

feat(engine): add test cases

feat(engine): add test cases

feat(ast): add test cases for environment

refactor(ast): refactor code

fix(gh): fix action fail by setting Go version to v1.21