feat(styles): Update code block syntax mixin

- Updated the `code-block-syntax` mixin in `_mixins.scss`
- Added support for multiple languages by accepting an array of language names
- Each language now has its own CSS class and pre tag styling

This commit improves the flexibility and extensibility of the code block syntax mixin, allowing it to handle multiple programming languages more effectively.

nodsoft_moltenobsidian_web/src/styles/_content.scss

@@ -82,6 +82,6 @@ table, .table {
   @include callout-color("info", rgb(0, 122, 255));
 }
 
-@include code-block-syntax("csharp") {
+@include code-block-syntax("csharp", "cs") {
   @import "syntax/csharp";
 }

nodsoft_moltenobsidian_web/src/styles/_mixins.scss

@@ -17,8 +17,10 @@
   font-size: 90%;
 }
 
-@mixin code-block-syntax($lang) {
-.lang-#{$lang} .#{$lang} pre {
-    @content;
+@mixin code-block-syntax($langs) {
+  @each $lang in $langs {
+    .lang-#{$lang} .#{$lang} pre {
+      @content;
+    }
   }
 }