Fix rendering of inline code blocks for docs

Styling of codeblocks:

- Uniform margins as other documentation elements.
- Add small margin for inline code-blocks.
- Use different background color for inline code-blocks.
- Introduce `inline-code` and `code-block` mixins for clarity in
  styling.

Overflowing of codeblocks:

- Improve flex layout of the tree component to be handle overflowing
  content and providing maximum available width. To be able to correctly
  provide maximum available width in card content, card expansion layout
  is changed so both close button and the content gets their full width.
- Other refactorings to support this:
  - Introduce separate Vue component for checkboxes of nodes for better
    separation of concerns and improved maintainability.
  - Refactor `LeafTreeNode` to make it simpler, separating layout concerns
    from other styling.
  - `ScriptsTree.vue`: Prefer `<div>`s instead of `<span>`s as they
    represent large content.
  - Remove unnecessary `<div>`s and use `<template>`s to reduce HTML
    complexity.
  - Update script documentation to not include unnecessary left padding
    on script code blocks.
  - Refactor SCSS variable names in `DocumentationText.vue` for clarity.

src/presentation/components/Scripts/View/Cards/CardListItem.vue

@@ -30,15 +30,15 @@
       />
     </div>
     <div class="card__expander" @click.stop>
-      <div class="card__expander__content">
-        <ScriptsTree :category-id="categoryId" />
-      </div>
       <div class="card__expander__close-button">
         <AppIcon
           icon="xmark"
           @click="collapse()"
         />
       </div>
+      <div class="card__expander__content">
+        <ScriptsTree :category-id="categoryId" />
+      </div>
     </div>
   </div>
 </template>
@@ -184,20 +184,24 @@ $card-horizontal-gap    : $card-gap;
     position: relative;
     background-color: $color-primary-darker;
     color: $color-on-primary;
+
     display: flex;
     align-items: center;
+    flex-direction: column;
 
     &__content {
-      flex: 1;
       display: flex;
       justify-content: center;
       word-break: break-word;
+      margin-bottom: 1em;
+      margin-left: 0.5em;
+      margin-right: 0.5em;
+      max-width: 100%; // Prevents horizontal expansion of inner content (e.g., when a code block is shown)
     }
 
     &__close-button {
-      width: auto;
       font-size: 1.5em;
-      align-self: flex-start;
+      align-self: flex-end;
       margin-right: 0.25em;
       @include clickable;
       color: $color-primary-light;
@@ -242,8 +246,6 @@ $card-horizontal-gap    : $card-gap;
 
     .card__expander {
       min-height: 200px;
-      // max-height: 1000px;
-      // overflow-y: auto;
       margin-top: $expanded-margin-top;
       opacity: 1;
     }