Add support for dynamic image composition with Imagick in dynamicimages module

- Update `Dockerfile` to install `Imagick` dependencies and enable the extension.
- Enhance `dynamicimages_image_t` with canvas lifecycle methods (`initImageCanvas`, `clearImage`, etc.), transformations (`resize`, `crop`, `rotate`, etc.), and explicit asset compositing.
- Extend `dynamicimages_image_i` interface with corresponding method signatures.
- Refactor `machine_1` to utilize dynamic image canvas and layered asset drawing.

services/nginx/app/modules/dynamicimages/interfaces/dynamicimages_image_i.php

@@ -3,6 +3,7 @@
 namespace dynamicimages\interfaces;
 
 use dynamicimages\classes\dynamicimages_asset;
+use dynamicimages\helpers\dynamicimages_tool;
 
 interface dynamicimages_image_i
 {
@@ -23,4 +24,65 @@ interface dynamicimages_image_i
      * @return self
      */
     public function addAsset(dynamicimages_asset $asset): self;
+
+    // ===== Canvas lifecycle (internal image property) =====
+    /**
+     * Initialize a blank Imagick canvas with the specified size.
+     * Background can be 'transparent' or any valid color string.
+     */
+    public function initImageCanvas(int $width, int $height, string $background = 'transparent'): self;
+
+    /**
+     * Clear and destroy the current canvas, if any.
+     */
+    public function clearImage(): self;
+
+    /**
+     * Return current canvas size as [width => int, height => int].
+     * Throws if canvas is not initialized.
+     * @return array{width:int,height:int}
+     */
+    public function getCanvasSize(): array;
+
+    // ===== Explicit asset compositing =====
+    /**
+     * Draw an asset onto the canvas at (x,y) with given opacity (0..1).
+     * Requires the canvas to be initialized first via initImageCanvas().
+     */
+    public function drawAsset(dynamicimages_asset $asset, int $x, int $y, float $opacity = 1.0): self;
+
+    // ===== Transformations on the temporary image object =====
+    public function resize(int $width, int $height): self;
+    public function crop(int $width, int $height, int $x, int $y): self;
+    public function rotate(float $degrees, string $background = 'transparent'): self;
+    /** Set global canvas opacity (0..1). */
+    public function setOpacity(float $opacity): self;
+
+    /**
+     * Set tools to apply to the image
+     * @param dynamicimages_tool[] $tools
+     * @return self
+     */
+    public function setTools(array $tools): self;
+
+    /**
+     * Add a single tool to the list
+     * @param dynamicimages_tool $tool
+     * @return self
+     */
+    public function addTool(dynamicimages_tool $tool): self;
+
+    /**
+     * Get all tools assigned to this image
+     * @return dynamicimages_tool[]
+     */
+    public function getTools(): array;
+
+    /**
+     * Export the composed image as base64 data URI
+     * @param string|null $format Optional target format (e.g. 'png', 'jpeg')
+     * @param int $quality Quality for lossy formats (0-100)
+     * @return string base64 data URI string (e.g. data:image/png;base64,....)
+     */
+    public function exportAsBase64(?string $format = null, int $quality = 90): string;
 }