Add Thai Solar Date convert to Thai Lunar Date

## Detailed description

Add Thai Solar Date convert to Thai Lunar Date

## Context

Th function will help user for converting Thai Solar Date to Thai Lunar Date.

## Possible implementation

Today, I found [gist from github](https://gist.github.com/touchiep/99f4f5bb349d6b983ef78697630ab78e) that write in VBA for MS Excel. https://pantip.com/topic/41786522.