add ideas file

ideas.md

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+# Focal Point
+
+Support various focal point plugins, because on ActivityPub we have less control how images are rendered on the other side.
+
+https://docs.joinmastodon.org/spec/activitypub/#focalPoint
+
+## Image Background Focus Position
+
+https://www.wordpress-focalpoint.com/
+
+Meta field: `bg_pos_desktop`
+Value: string, e.g. `50% 50%`, like the css option [object-position](https://developer.mozilla.org/en-US/docs/Web/CSS/object-position)
+
+
+## WP Smart Crop
+
+https://www.wpsmartcrop.com/download/
+
+Meta field if enabled for this image: `_wpsmartcrop_enabled` bool
+Meta field: `_wpsmartcrop_image_focus`
+Value: array with keys `top` and `left` which are floats.