Add glyphName, htmlCode, cssCode to glyph inspector.

[ahaoboy]

Description

Referencing the site website, adding glyphName, glyph, htmlCode, cssCode to the glyph inspector for easy copying. Due to no response on #586, I separately submitted this PR.

For cases involving multiple unicode, the use of String.fromCodePoint.apply also works.

var str = '\uD83D\uDC04';
console.log(str)

var str2 =  String.fromCodePoint.apply(null, [55357, 56324])
console.log(str2)

Motivation and Context

For easier copying of unicode characters

How Has This Been Tested?

Local testing ensures proper functionality when copying and pasting into HTML and CSS.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I did npm run test and all tests passed green (including code styling checks).
• I have added tests to cover my changes.
• My change requires a change to the documentation.
• I have updated the README accordingly.
• I have read the CONTRIBUTING document.

[Connum]

Why go the route loading the font via CSS instead of getting the data directly from the Font object? This also has the same issue as #586

[ahaoboy]

Why go the route loading the font via CSS instead of getting the data directly from the Font object? This also has the same issue as #586

I'm not familiar with the font API, so I referred to #586. I also couldn't find a way to directly obtain the corresponding string from glyphs. If there's a better solution, please guidance me. Additionally, how should we add the string corresponding to the glyphs to their attributes?