feat: add adapter documentation link button

Add 'View Docs' button that links to the corresponding adapter's
documentation page via link.langbot.app short links.

Appears in:
- Wizard adapter selection cards (Step 0)
- Wizard bot config card header (Step 1)
- Bot create/edit form (adapter config section)

Supports all 7 languages (en/zh-Hans/zh-Hant/ja/th/vi/es).
Doc links auto-resolve to the correct language based on UI locale.

web/src/i18n/locales/zh-Hant.ts

@@ -275,6 +275,7 @@ const zhHant = {
     platformAdapter: '平台/適配器選擇',
     selectAdapter: '選擇適配器',
     adapterConfig: '適配器設定',
+    viewAdapterDocs: '查看文檔',
     bindPipeline: '綁定流程線',
     selectPipeline: '選擇流程線',
     selectBot: '請選擇機器人',