fix: track plugin data.json files + unblock gitignore exception

calendar/data.json:
  - shouldConfirmBeforeCreate: false
  - localeOverride: en-GB
  - weekStart: monday
  - showNoteIndicator: true
  - showWeeklyNote: false

thino/data.json: full UI config with daily save mode, list view

.gitignore updated:
  .obsidian/plugins/*/data.json  (still blocks API keys, sync tokens, etc)
  !calendar/data.json            (exception — safe config, no secrets)
  !thino/data.json               (exception — safe config, no secrets)

Future users now get full plugin configuration out of the box.

.obsidian/plugins/calendar/data.json

@@ -0,0 +1,7 @@
+{
+  "shouldConfirmBeforeCreate": false,
+  "localeOverride": "en-GB",
+  "weekStart": "monday",
+  "showWeeklyNote": false,
+  "showNoteIndicator": true
+}