feat(config): surface optional anki/jimaku keys in example config

Add ankiConnect.deck, jimaku.apiKey, and jimaku.apiKeyCommand to the
defaults so they appear in the generated config.example.jsonc, and
change the static/animated image maxima (imageMaxWidth, imageMaxHeight,
animatedMaxHeight) from undefined to 0 so they render too. The resize
paths already treat 0 as "no limit", so this is behavior-neutral and
just improves discoverability of these previously-undocumented keys.

src/config/definitions/defaults-integrations.ts

@@ -24,6 +24,7 @@ export const INTEGRATIONS_DEFAULT_CONFIG: Pick<
       upstreamUrl: 'http://127.0.0.1:8765',
     },
     tags: ['SubMiner'],
+    deck: '',
     fields: {
       word: 'Expression',
       audio: 'ExpressionAudio',
@@ -43,11 +44,11 @@ export const INTEGRATIONS_DEFAULT_CONFIG: Pick<
       imageType: 'static',
       imageFormat: 'jpg',
       imageQuality: 92,
-      imageMaxWidth: undefined,
-      imageMaxHeight: undefined,
+      imageMaxWidth: 0,
+      imageMaxHeight: 0,
       animatedFps: 10,
       animatedMaxWidth: 640,
-      animatedMaxHeight: undefined,
+      animatedMaxHeight: 0,
       animatedCrf: 35,
       syncAnimatedImageToWordAudio: true,
       audioPadding: 0.5,
@@ -88,6 +89,8 @@ export const INTEGRATIONS_DEFAULT_CONFIG: Pick<
   },
   jimaku: {
     apiBaseUrl: 'https://jimaku.cc',
+    apiKey: '',
+    apiKeyCommand: '',
     languagePreference: 'ja',
     maxEntryResults: 10,
   },