Actually show glyphs for latex or emoji shortcodes being suggested in the REPL (#54800)
When a user requests a completion for a backslash shortcode, this PR
adds the glyphs for all the suggestions to the output. This makes it
much easier to find the result one is looking for, especially if the
user doesn't know all latex and emoji specifiers by heart.
Before:
<img width="813" alt="image"
src="https://github.com/JuliaLang/julia/assets/22495855/bf651399-85a6-4677-abdc-c66a104e3b89">
After:
<img width="977" alt="image"
src="https://github.com/JuliaLang/julia/assets/22495855/04c53ea2-318f-4888-96eb-0215b49c10f3">
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Co-authored-by: Dilum Aluthge <dilum@aluthge.com>