paintplus: vendor the app source and rename from EditmaskwithAI

Bring the full EditmaskwithAI application into the repo under paintplus/
(429 files) so the service is self-contained — the installer copies the
vendored source to ~/docker/paintplus/src instead of cloning at runtime.

Rename to PaintPlus (service + branding; app logic untouched):
- services/editmaskwithai.sh -> services/paintplus.sh (register_service
  paintplus, install_paintplus, ~/docker/paintplus, Caddy paintplus:8000,
  Authelia option preserved)
- container names -> paintplus across docker-compose*.yml; dev network
  -> paintplus-network
- browser <title> -> "PaintPlus - AI Image Editor"; README heading ->
  PaintPlus with upstream provenance note
- README utilities table: editmaskwithai -> paintplus

Backend/frontend code (help strings referencing the old container name,
the ai_photo_edit.db filename) is intentionally left as-is to avoid
touching application logic.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Nb2vJ8W7bHKx1JXVvpCraH

paintplus/frontend/src/js/modules/effects/solarize.js

@@ -0,0 +1,55 @@
+import app from './../../app.js';
+import config from './../../config.js';
+import Dialog_class from './../../libs/popup.js';
+import Base_layers_class from './../../core/base-layers.js';
+import ImageFilters from './../../libs/imagefilters.js';
+import alertify from './../../../../node_modules/alertifyjs/build/alertify.min.js';
+
+class Effects_solarize_class {
+
+	constructor() {
+		this.POP = new Dialog_class();
+		this.Base_layers = new Base_layers_class();
+	}
+
+	solarize() {
+		if (config.layer.type != 'image') {
+			alertify.error('This layer must contain an image. Please convert it to raster to apply this tool.');
+			return;
+		}
+
+		//get canvas from layer
+		var canvas = this.Base_layers.convert_layer_to_canvas(null, true);
+		var ctx = canvas.getContext("2d");
+
+		//change data
+		var img = ctx.getImageData(0, 0, canvas.width, canvas.height);
+		var data = this.change(img);
+		ctx.putImageData(data, 0, 0);
+
+		//save
+		return app.State.do_action(
+			new app.Actions.Update_layer_image_action(canvas)
+		);
+	}
+
+	change(data) {
+		var filtered = ImageFilters.Solarize(data);
+
+		return filtered;
+	}
+
+	demo(canvas_id, canvas_thumb){
+		var canvas = document.getElementById(canvas_id);
+		var ctx = canvas.getContext("2d");
+		ctx.drawImage(canvas_thumb, 0, 0);
+
+		//now update
+		var img = ctx.getImageData(0, 0, canvas_thumb.width, canvas_thumb.height);
+		var data = this.change(img);
+		ctx.putImageData(data, 0, 0);
+	}
+
+}
+
+export default Effects_solarize_class;