feat: add token type value for in search operator

feat: add string value of equals operator

feat: add search pagination operation

fix: cmp expression fix only two arguments

fix: alter comment

test: add $ne repository test

feat: implement $ne example repository

feat: implement $ne expression dsl

test: add $lte repository test

feat: implement $lte example repository

feat: implement $lte expression dsl

test: add $lt repository test

feat: implement $lt example repository

feat: implement $lt expression dsl

test: add $gte repository test