Support Arithmetic function SIZE

[shouwn]

Backgrounds

• Kotlin JDSL does not yet support an arithmetic function SIZE.

Objects

• Support an arithmetic function SIZE.

Requirements

• Creates size() function in com.linecorp.kotlinjdsl.dsl.jpql.Jpql for supporting an arithmetic function SIZE.

Contribution

• Please check if there is an assignee in this issue. And if it don't have an assignee, please leave comment to assign.
• Please check the commit convention through the commitlint.config.js file. The commit convention also described in the PR template.
• When you use intellij, please set the code style through the .editorconfig file.
• Please create the PR for develop as the base branch.
• If you have any questions, please leave comment in Kotlin-JDSL Discord Channel in LINE Open Source

[jbl428]

I would like to work on this issue.

[shouwn]

I apologize for the late check. I have assigned this issue to you. Thanks for your help!