I cannot install colorls successfully on Windows 10

### Description

I am a developer, but I am not a ruby person, so the solutions to my problems may be simple to other folks (I hope so!).

I have tried to install `colorls `on `Windows 10 2004, Build 20262.1010` (not WSL) with `pwsh 7.1.0`. I went directly to the Ruby site and download the Windows installer for Ruby 2.7.2-1 (x64). Then I installed `colorls `using `scoop`. Next, I fired up a new `pwsh `and ran `gem install colorls`. This failed immediately with these messages:

```
chris@cahokia > gem install colorls
Traceback (most recent call last):
15: from :1:in `'
14: from :1:in `require'
13: from C:/Ruby27-x64/lib/ruby/2.7.0/rubygems.rb:1424:in `'
12: from C:/Ruby27-x64/lib/ruby/2.7.0/rubygems.rb:1424:in `require'
11: from C:/Ruby27-x64/lib/ruby/2.7.0/rubygems/defaults/operating_system.rb:3:in `'
10: from C:/Ruby27-x64/lib/ruby/site_ruby/2.7.0/ruby_installer/runtime/singleton.rb:27:in `enable_dll_search_paths'
9: from C:/Ruby27-x64/lib/ruby/site_ruby/2.7.0/ruby_installer/runtime/msys2_installation.rb:99:in `enable_dll_search_paths'
8: from C:/Ruby27-x64/lib/ruby/site_ruby/2.7.0/ruby_installer/runtime/msys2_installation.rb:89:in `mingw_bin_path'
7: from C:/Ruby27-x64/lib/ruby/site_ruby/2.7.0/ruby_installer/runtime/msys2_installation.rb:76:in `msys_path'
6: from C:/Ruby27-x64/lib/ruby/site_ruby/2.7.0/ruby_installer/runtime/msys2_installation.rb:48:in `iterate_msys_paths'
5: from C:/Ruby27-x64/lib/ruby/2.7.0/win32/registry.rb:542:in `open'
4: from C:/Ruby27-x64/lib/ruby/2.7.0/win32/registry.rb:435:in `open'
3: from C:/Ruby27-x64/lib/ruby/site_ruby/2.7.0/ruby_installer/runtime/msys2_installation.rb:49:in `block in iterate_msys_paths'
2: from C:/Ruby27-x64/lib/ruby/2.7.0/win32/registry.rb:611:in `each_key'
1: from C:/Ruby27-x64/lib/ruby/2.7.0/win32/registry.rb:910:in `export_string'
C:/Ruby27-x64/lib/ruby/2.7.0/win32/registry.rb:910:in `encode': U+00AE to IBM437 in conversion from UTF-16LE to UTF-8 to IBM437 (Encoding::UndefinedConversionError)
```
I also get the same errors shown above when I try to run `ruby` by itself. `rubyw` actually popped up a window, but that window terminated very quickly and posted no information back my terminal

I am not a `rubyenv` user, so the advice to run `rubyenv rehash` and `rehash` did not help in my case.

At this point I decided that I wasn't making progress, so I uninstalled everything. Any advice? Thanks much.

- Relevant Issues : (none)
- Relevant PRs : (none)
- Type of issue :
- [x] Installation
- [ ] Font-related
- [ ] Feature request
- [ ] Bug in existing feature???
- [ ] Developer mode : Code quality / Tests / Documentation

Start by reproducing `gem install colorls` and `ruby` on Windows 10 with Ruby 2.7.2-1 and PowerShell 7.1.0, using the reported `Encoding::UndefinedConversionError` trace as the starting point. Determine whether the failure belongs to colorls or the RubyInstaller/MSYS2 registry encoding path; done means a documented or verified installation path works outside WSL.

Written by the indexing model from the issue text.