Refresh player with native block editor preview and local assets

Preserve shortcode rendering, normalize options, bundle the player locally,
and add reproducible packaging and WordPress integration tests.

block.json

@@ -0,0 +1,37 @@
+{
+  "$schema": "https://schemas.wp.org/trunk/block.json",
+  "apiVersion": 3,
+  "name": "lamgc/asciiplayer",
+  "version": "1.1.0",
+  "title": "Asciicast Player",
+  "category": "media",
+  "icon": "editor-code",
+  "description": "Embed and preview a terminal recording with the locally bundled asciinema player.",
+  "keywords": ["asciinema", "terminal", "recording"],
+  "textdomain": "wp-asciiplayer",
+  "attributes": {
+    "source": { "type": "string", "default": "" },
+    "theme": { "type": "string", "default": "asciinema" },
+    "speed": { "type": "number", "default": 1 },
+    "loop": { "type": "boolean", "default": false },
+    "controls": { "type": "string", "default": "auto", "enum": ["auto", "always", "never"] },
+    "fit": { "type": "string", "default": "width", "enum": ["width", "height", "both", "none"] },
+    "startAt": { "type": "number", "default": 0 },
+    "idleTimeLimit": { "type": "number", "default": 0 },
+    "autoPlay": { "type": "boolean", "default": false },
+    "preload": { "type": "boolean", "default": true },
+    "width": { "type": "string", "default": "100%" },
+    "legacyStyle": { "type": "string", "default": "" },
+    "cols": { "type": "number" },
+    "rows": { "type": "number" },
+    "terminalFontFamily": { "type": "string" },
+    "terminalFontSize": { "type": "string" },
+    "terminalLineHeight": { "type": "number" },
+    "poster": { "type": "string" }
+  },
+  "supports": { "html": false, "align": ["wide", "full"] },
+  "editorScript": "lamgc-asciiplayer-editor",
+  "viewScript": "lamgc-asciiplayer-view",
+  "editorStyle": "lamgc-asciiplayer-editor-style",
+  "style": "lamgc-asciiplayer-style"
+}