Additional ligatures for regex matching in Postgres and Powershell multiline comments

[PeterCullenBurbery]

I would like to request 5 additional ligatures.
3 ligatures for PostgreSQL regex operations.
~* case insensitive regex match
!~ case-sensitive regex do not match
!~* case insensitive regex do not match
2 ligatures for Powershell multiline block comments
<# start
#> end