[TCLCORE] New unsupported ICU commands

[<apn...@ya...>]

I would like to add the following commands to the existing
tcl::unsupported::icu namespace for 9.0.1/9.1.

 

icu convertto ?-profile PROFILE? ICUENC STRING

icu convertfrom ?-profile PROFILE? ICUENC BYTES

 

These parallel Tcl's "encoding convertto,convertfrom". Their purpose is
further testing of Tcl encodings by comparing with ICU.

 

icu normalize ?-profile PROFILE? ?-mode NFC|NFD|NFKC|NFKD? STRING

 

This allows for experimenting with Unicode normalization forms as a basis
for introducing the functionality into some future Tcl release.

 

Since these are in unsupported namespace, no TIP is planned.

 

If there are no objections or concerns, I'll merge them in a couple of days.

 

/Ashok