Fixes #8040

Fixes #9232

Fixes #9180

Co-authored-by: James Eapen <jamespeapen@gmail.com>

Fixes #9266

The ZSH_THEME_RANDOM_BLACKLIST variable will be deprecated until it's
removed 2 months from now.

Add --no-rehash to the pyenv init command, which was removed in [#4492].

The rehash was likely disabled because it can affect shell startup times.
It should only be necessary when installing or removing Python versions.

See [pyenv/pyenv#784] and [sorin-ionescu/prezto#1603] for more detail.

[#4492]: https://github.com/ohmyzsh/ohmyzsh/pull/4492
[pyenv/pyenv#784]: https://github.com/pyenv/pyenv/issues/784
[sorin-ionescu/prezto#1603]: https://github.com/sorin-ionescu/prezto/pull/1603

Fixes #9237

Co-authored-by: Marc Cornellà <marc.cornella@live.com>

Fixes #9153

Fixes #9212

Fixes #8743

Closes #9223

My system doesn't have `perl` in $PATH, so using this theme clutters the
shell output quite a bit.

Turns out, the same thing can be accomplished in pure zsh (with
extendedglob).

Co-Authored-By: Marc Cornellà <marc.cornella@live.com>

Fixes #9207

Co-authored-by: Marc Cornellà <marc.cornella@live.com>

Note: `upgrade_oh_my_zsh` is deprecated. Use `omz update` instead.

Co-authored-by: Marc Cornellà <marc.cornella@live.com>

Enough users have complained about the bug label not being applied instead. If there is no label applied
this won't be complained about so often.

It conflicts with normal Backspace behavior. Fixes #9155

For now, it only adds a link to the Discord server.