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/webpack.config.js

@@ -0,0 +1,56 @@
+var webpack = require('webpack');
+var path = require('path');
+
+module.exports = {
+	entry: [
+		'./src/js/main.js',
+	],
+	output: {
+		path: path.resolve(__dirname, 'dist'),
+		filename: 'bundle.js',
+		publicPath: '/dist/'
+	},
+	resolve: {
+		extensions: ['.js', '.css'],
+		alias: {
+			Utilities: path.resolve(__dirname, './../node_modules/')
+		}
+	},
+	module: {
+		rules: [
+			{
+				test: /\.css$/,
+				use: [
+					'style-loader',
+					{
+						loader: 'css-loader',
+						options: {url: false}
+					}
+				]
+			},
+			{
+				test: /\.js$/,
+				exclude: /(node_modules|bower_components)/,
+				use: ['babel-loader']
+			},
+		]
+	},
+	plugins: [
+		new webpack.ProvidePlugin({
+            $: "jquery",
+            jQuery: "jquery",
+            "window.jQuery": "jquery"
+		}),
+		new webpack.DefinePlugin({
+			VERSION: JSON.stringify(require("./package.json").version)
+		}),
+	],
+	devtool: "cheap-module-source-map",
+	devServer: {
+		// host: '0.0.0.0',
+		//contentBase: "./",
+		static: {
+			directory: path.resolve(__dirname, "./"),
+		},
+	}
+};