wip: Fix Reline ASCII-8BIT <-> UTF-8 issues

[sjanusz-r7]

This PR is trying to fix some of the Reline issues I have introduced as part of: #19397

This PR changes the main msfconsole prompt to provide input and output as UTF-8-encoded strings by providing UTF-8 wrappers around some of our commonly used IO classes.

It seems like these changes could have a wide impact than I initially anticipated as it begins to introduce ASCII-8BIT <-> UTF-8 encoding issues both ways. I will keep testing and addressing any edge cases I come across.

Affected issues:

• msfconsole cannot input Chinese characters, and pasting Chinese characters will result in an error #19513
• Tab completion changes after Ctrl+C #19519 (Will be fixed in a separate PR)

I am currently fixing the tests. Tests should now pass.

Verification

• Create an example file on disk with non-English characters, e.g. touch メタスプロイトが大好きです
• Write some output to the file, e.g. echo 'hello world!' > メタスプロイトが大好きです
• Start msfconsole
• Verify you can call off to the local filesystem with autocompletion: cat メタスプ<TAB> This did not work previously with Readline as we do not have a Filesystem dispatcher in the stack which implements def_cat_tabs when trying to auto-complete local filenames.
• Get a meterpreter shell vs e.g. Windows
• Create the non-English file on the Windows box
• Enter the Meterpreter shell
• Verify you can auto-complete the filename: cat メタスプ<TAB> which should result in cat メタスプロイトが大好きです
• Verify pressing Enter results in the file contents being read and output.