* Fix conflicting strings issue in translations
* Preserve structure of `customTranslations`
* Use `deepmerge` to merge whole of `localized-strings`
* Simplify and make deep property access on an object safe
* Fix deep property accessor and rename it to idx
* Refactor mdToHtml out
* Refactor routing + move it to server instead of core
* Refactor & Add more tests for server utils
* Refactor isSeparateCss function from server & generate
* Refactor insertTableOfContents from server & generate + add tests
* undo small nits