Introducing quality levels (#20802)

Author: deven96

src/content/partials/images/quality.mdx

@@ -9,20 +9,34 @@ At the moment, this setting only works directly with [image transformations](/im
 
 Specifies quality for images in JPEG, WebP, and AVIF formats. The quality is in a 1-100 scale, but useful values are between `50` (low quality, small file size) and `90` (high quality, large file size). `85` is the default. When using the PNG format, an explicit quality setting allows use of PNG8 (palette) variant of the format.
 
+We also allow setting one of the perceptual quality levels `high|medium-high|medium-low|low`
+
 <Tabs>
   <TabItem label="URL format">
     ```js
     quality=50
+    
+    OR
+    
+    quality=low
     ```
   </TabItem>
   <TabItem label="URL format alias">
   ```js
   q=50
+
+  OR
+  
+  q=medium-high
   ```
   </TabItem>
   <TabItem label="Workers">
   ```js
   cf: {image: {quality: 50}}
+
+  OR
+
+  cf: {image: {quality: "high"}}
   ```
   </TabItem>
-</Tabs>
+</Tabs>