Introduce mediatypes directory with image type data

.github/labeler.yml

@@ -36,6 +36,10 @@ data:mathml:
   - changed-files:
       - any-glob-to-any-file:
           - "mathml/**"
+data:media:
+  - changed-files:
+      - any-glob-to-any-file:
+          - "media/**"
 data:svg:
   - changed-files:
       - any-glob-to-any-file:

.github/workflows/system-file-changes.yml

@@ -15,6 +15,7 @@ on:
       - "!javascript/**.json"
       - "!manifests/**.json"
       - "!mathml/**.json"
+      - "!media/**.json"
       - "!svg/**.json"
       - "!webassembly/**.json"
       - "!webdriver/**.json"

.vscode/settings.json

@@ -18,6 +18,7 @@
         "/javascript/*.json",
         "/manifests/*.json",
         "/mathml/*.json",
+        "/media/*.json",
         "/svg/*.json",
         "/webdriver/*.json",
         "/webextensions/*.json"

README.md

@@ -187,6 +187,14 @@ Data for [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) features,
 
 - `elements` - Elements
 
+### [`media`](./media)
+
+Data for [Media format](https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats) features, including:
+
+- `formats/image` - Image formats
+
+An image format is considered supported if it displays correctly when used in an `<img>` element's `src` attribute, or as a CSS `background-image`.
+
 ### [`svg`](./svg)
 
 Data for [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) features, including: