Move away from using Prelude / glob imports

[joshka]

Problem

Based on much feedback from @EdJoPaTo across multiple PRs, as well as seeking external feedback on users.rust-lang.org, reddit, our forum and discord servers, it's time to fix up how we use the prelude.

• https://users.rust-lang.org/t/to-use-prelude-or-to-not-to-use-prelude-that-is-the-question/110855
• https://www.reddit.com/r/rust/comments/1cle18j/to_prelude_or_to_not_to_prelude/
• https://discord.com/channels/1070692720437383208/1070692720437383211/1236238741001994340
• https://forum.ratatui.rs/t/help-us-understand-prelude-usage/33

The overwhelming response gave me the impression at least in code that is used for teaching / communicating that the prelude causes more harm than good. This was counter to my prior understanding of this.

Solution

• [ ] Summarize the responses more fully (perhaps write a blog post about this)
• [x] Fixup the common vocabulary (https://github.com/ratatui-org/ratatui/pull/1149)
• [x] Remove prelude from examples/*.rs (https://github.com/ratatui-org/ratatui/pull/1152)
• [ ] Remove the prelude from visible portions of examples in rustdocs
• [ ] Remove the prelude from tutorial code on the website

Alternatives

Additional context