[FEATURE] Better-looking LaTeX source view

[mozhewen]

Description of the Problem

1. We don't have to italicize every character in the tex source. For example numbers and brackets are better shown in a normal style.
2. The unicode characters for \langle and \rangle are ⟨⟩ (U+27E8, U+27E9) instead of the CJK 〈〉 (U+3008, U+3009).

The first one may turn out to be my personal taste.

Description of the Solution

1. This may be added to user's CSS snippets, or to styles.css.

span.cm-math {
    &.cm-number, &.cm-bracket, &.cm-tag, &.cm-error {
        font-style: normal;
    }
}

2. Modify these lines:
   

   obsidian-latex-suite/src/editor_extensions/conceal_maps.ts

   Lines 497 to 500 in 934a54c

   	"left<": "〈",
   	"right>": "〉",
   	"langle": "〈",
   	"rangle": "〉",

• Before
  

• After