Feat: Add column pinning to database table viewer

[DevDengChao]

Sorry, I did not run this modified version ever, cause it always says Kotlin: Plugin classpath entry points to a non-existent location when I was trying to run the app:

See: https://youtrack.jetbrains.com/issue/DBE-5311/Ability-to-pin-columns

[ivankrut856]

Hello. Thank you for your PR. Unfortunately, we cannot accept it due to the following:

• First of all - it seems that this doesn't pin columns, but simply moves them to the left. This is not what is commonly understood as pinning.
• Also the code doesn't meet our quality standards in terms of overall cohesion, reuse and established practices.
• As you declared yourself - you haven't run nor tested the code.