Feature/worker threads generation (#43)

* Add worker threads architecture plan for blog generation

* fix: tries to optimize rendering, still slow

* feat: moved site rendering into web worker

* fix: calendar grabs from central data source for calendar

* fix: feeds now use blog language content and not canonical content

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Co-authored-by: hugo <hugoms@me.com>

.vscode/settings.json

@@ -8,6 +8,8 @@
         "gh": true,
         "git add": true,
         "git commit": true,
-        "git push": true
+        "git push": true,
+        "uniq": true,
+        "diff": true
     }
 }