format: apply repo prettier (3.8.1) to the folded skills tree

963 markdown files reformatted with the repository's pinned prettier so
pnpm format:check covers the folded tree like every other repo file.

The formatter's embedded-language pass also normalized code fences
(TS semicolons, closed HTML tags in examples, lowercased CSS hex colors,
one renumbered list that skipped an index). Alphanumeric token deltas vs
the fold commit were audited file-by-file; all are formatter-equivalent
markup normalizations plus the four sanitized skills.

packages/mosaic/framework/skills/tailwind-design-system/SKILL.md

@@ -32,7 +32,7 @@ Build production-ready design systems with Tailwind CSS v4, including CSS-first
 
 ```css
 /* app.css - Tailwind v4 CSS-first configuration */
-@import "tailwindcss";
+@import 'tailwindcss';
 
 /* Define your theme with @theme */
 @theme {
@@ -734,8 +734,8 @@ export function ThemeToggle() {
 
 ```typescript
 // lib/utils.ts
-import { type ClassValue, clsx } from "clsx";
-import { twMerge } from "tailwind-merge";
+import { type ClassValue, clsx } from 'clsx';
+import { twMerge } from 'tailwind-merge';
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
@@ -743,12 +743,12 @@ export function cn(...inputs: ClassValue[]) {
 
 // Focus ring utility
 export const focusRing = cn(
-  "focus-visible:outline-none focus-visible:ring-2",
-  "focus-visible:ring-ring focus-visible:ring-offset-2",
+  'focus-visible:outline-none focus-visible:ring-2',
+  'focus-visible:ring-ring focus-visible:ring-offset-2',
 );
 
 // Disabled utility
-export const disabled = "disabled:pointer-events-none disabled:opacity-50";
+export const disabled = 'disabled:pointer-events-none disabled:opacity-50';
 ```
 
 ## Advanced v4 Patterns
@@ -783,7 +783,7 @@ Define reusable custom utilities:
 }
 
 /* Import with theme options */
-@import "tailwindcss" theme(static);
+@import 'tailwindcss' theme(static);
 ```
 
 ### Namespace Overrides
@@ -808,16 +808,8 @@ Define reusable custom utilities:
 @theme {
   /* Use color-mix() for alpha variants */
   --color-primary-50: color-mix(in oklab, var(--color-primary) 5%, transparent);
-  --color-primary-100: color-mix(
-    in oklab,
-    var(--color-primary) 10%,
-    transparent
-  );
-  --color-primary-200: color-mix(
-    in oklab,
-    var(--color-primary) 20%,
-    transparent
-  );
+  --color-primary-100: color-mix(in oklab, var(--color-primary) 10%, transparent);
+  --color-primary-200: color-mix(in oklab, var(--color-primary) 20%, transparent);
 }
 ```