feat: Add VitePress docs, EPUB to PDF tool, Phosphor icons, and licensing updates

- Set up VitePress documentation site (docs:dev, docs:build, docs:preview)
- Added Getting Started, Tools Reference, Contributing, and Commercial License pages
- Created self-hosting guides for Docker, Vercel, Netlify, Cloudflare, AWS, Hostinger, Nginx, Apache
- Updated README with documentation link, sponsors section, and docs contribution guide

- Added EPUB to PDF converter using LibreOffice WASM

- Migrated to Phosphor Icons for consistent iconography

- Added donation ribbon banner on landing page
- Removed 'Like My Work?' section (replaced by ribbon)
- Updated licensing.html with delivery model, AGPL notice, invoicing, and no-refund policy

- Added Commercial License documentation page
- Updated translations table (Chinese added, marked non-English as In Progress)

- Added sponsors.yml workflow for auto-generating sponsor avatars

docs/.vitepress/cache/deps/_metadata.json

@@ -0,0 +1,58 @@
+{
+  "hash": "9bc6d4f1",
+  "configHash": "de601e5a",
+  "lockfileHash": "6c1ba38e",
+  "browserHash": "669b23ae",
+  "optimized": {
+    "vue": {
+      "src": "../../../../node_modules/vue/dist/vue.runtime.esm-bundler.js",
+      "file": "vue.js",
+      "fileHash": "25632ac1",
+      "needsInterop": false
+    },
+    "vitepress > @vue/devtools-api": {
+      "src": "../../../../node_modules/@vue/devtools-api/dist/index.js",
+      "file": "vitepress___@vue_devtools-api.js",
+      "fileHash": "f01e74c0",
+      "needsInterop": false
+    },
+    "vitepress > @vueuse/core": {
+      "src": "../../../../node_modules/@vueuse/core/index.mjs",
+      "file": "vitepress___@vueuse_core.js",
+      "fileHash": "8c581a91",
+      "needsInterop": false
+    },
+    "vitepress > @vueuse/integrations/useFocusTrap": {
+      "src": "../../../../node_modules/@vueuse/integrations/useFocusTrap.mjs",
+      "file": "vitepress___@vueuse_integrations_useFocusTrap.js",
+      "fileHash": "2cd049fb",
+      "needsInterop": false
+    },
+    "vitepress > mark.js/src/vanilla.js": {
+      "src": "../../../../node_modules/mark.js/src/vanilla.js",
+      "file": "vitepress___mark__js_src_vanilla__js.js",
+      "fileHash": "8f240f8c",
+      "needsInterop": false
+    },
+    "vitepress > minisearch": {
+      "src": "../../../../node_modules/minisearch/dist/es/index.js",
+      "file": "vitepress___minisearch.js",
+      "fileHash": "4848f633",
+      "needsInterop": false
+    },
+    "@theme/index": {
+      "src": "../../../../node_modules/vitepress/dist/client/theme-default/index.js",
+      "file": "@theme_index.js",
+      "fileHash": "b83632c3",
+      "needsInterop": false
+    }
+  },
+  "chunks": {
+    "chunk-2CLQ7TTZ": {
+      "file": "chunk-2CLQ7TTZ.js"
+    },
+    "chunk-LE5NDSFD": {
+      "file": "chunk-LE5NDSFD.js"
+    }
+  }
+}