feat(config): update default startup and subtitle style options

- Disable texthooker, websocket, and annotationWebsocket servers by default
- Update primary subtitle font family to include Hiragino Sans
- Switch subtitle backgrounds to transparent for primary and secondary
- Unify text shadow to stronger two-layer value for both subtitle tracks
- Set JLPT N4 default color to #8bd5ca
- Keep Yomitan popup auto-pause enabled and secondary font stack unchanged
- Update tests, generated config examples, and docs-site to match

src/config/definitions/defaults-core.ts

@@ -19,18 +19,18 @@ export const CORE_DEFAULT_CONFIG: Pick<
   subtitlePosition: { yPercent: 10 },
   keybindings: [],
   websocket: {
-    enabled: 'auto',
+    enabled: false,
     port: 6677,
   },
   annotationWebsocket: {
-    enabled: true,
+    enabled: false,
     port: 6678,
   },
   logging: {
     level: 'info',
   },
   texthooker: {
-    launchAtStartup: true,
+    launchAtStartup: false,
     openBrowser: false,
   },
   controller: {