feat: add ability to use ionicons as icon font

### Describe Problem

When viewing the latest cheatsheet for ionicons, there is no glyph that one can copy and paste like fontawesome does in their cheatsheet...

Example from fontawesome:

### Describe Preferred Solution

I would like to see an option to copy the glyph character in the cheatsheet found on:
https://ionic.io/ionicons

### Describe Alternatives

_No response_

### Additional Information

A reason I want to have this, is for whenever I have ionicons installed on something like my operating system, I'd be able to just copy and paste them into text editors and document editors.

Apparently version 2 of ionicons had this in the cheatsheet. But then I'd have to download the exact same version ionicons TTF font. This doesn't count for the latest cheatsheet.

Start at the current cheatsheet at https://ionic.io/ionicons and inspect how the latest icon set is presented. The work is done when the cheatsheet provides a copyable glyph character for each relevant icon, matching the requested behavior without requiring an older Ionicons font version.

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