feat: initial v0.1.0 MVP

Replaces Smush Pro's optimisation pipeline without the grey-wash bug.

CLI commands working:
  wp h4b-img status
  wp h4b-img optimise --id=<n>
  wp h4b-img bulk
  wp h4b-img rescue

Verified on dev.rds.ink:
- ICC profile preservation works (the Smush-bug fix)
- Bulk: 20 attachments → 487 KB saved (10.4%), 0 errors
- Rescue: end-to-end mechanism verified on WorkingAsOne_horse fixture
- WebP synchronous, AVIF queued via WP-Cron
- Originals backed up to wp-content/h4b-img-originals/

See CHANGELOG.md for details + ../DESIGN-h4b-image-optim.md for architecture.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

h4b-image-optim.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Plugin Name:       H4B Image Optim
+ * Plugin URI:        https://gitea.help4bis.com/help4bis/h4b-image-optim
+ * Description:       ICC-safe image optimisation with WebP + AVIF generation. Replaces Smush Pro without the grey-wash bug. No CDN.
+ * Version:           0.1.0
+ * Author:            help4bis (Henk + Claude)
+ * Author URI:        https://help4bis.com
+ * License:           GPL-2.0-or-later
+ * License URI:       https://www.gnu.org/licenses/gpl-2.0.txt
+ * Requires PHP:      8.1
+ * Requires at least: 6.4
+ * Text Domain:       h4b-image-optim
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+define( 'H4B_IMG_OPTIM_VERSION', '0.1.0' );
+define( 'H4B_IMG_OPTIM_FILE', __FILE__ );
+define( 'H4B_IMG_OPTIM_DIR', plugin_dir_path( __FILE__ ) );
+define( 'H4B_IMG_OPTIM_URL', plugin_dir_url( __FILE__ ) );
+define( 'H4B_IMG_OPTIM_SLUG', 'h4b-image-optim' );
+
+require_once H4B_IMG_OPTIM_DIR . 'includes/class-plugin.php';
+
+H4B\ImageOptim\Plugin::instance()->boot();