BUG: read_text() without UTF-8 encoding causes issues on Windows (uses cp1252 by default)

[Ariel-Rodriguez]

I was about to make use of this library on windows but, claude found a problem:

The upskill library is using read_text() without UTF-8 encoding, which causes issues on Windows (uses cp1252 by default).
This is a bug in the library.

[sachinML]

Opened a PR for this here
It updates the relevant read_text() call(s) to use encoding="utf-8" explicitly.