Feature/cleanup navigation

[mabrinasueller]

Add filter to clean up navigation and outsource function to group items by first level path

Fix #43

Test URLs: https://feature-cleanup-navigation--eds-editorial--ifahrentholz.hlx.page/

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Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

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Commits

* [bd21519](https://github.com/ifahrentholz/eds-editorial/pull/50/commits/bd21519bf8ec5cd72aa40b501672a008dd4a34b1) :white_check_mark: (latest) * [f50841a](https://github.com/ifahrentholz/eds-editorial/pull/50/commits/f50841a596431cabe1b4ab5ca672c68ac585c626) :white_check_mark: * [2e5dd21](https://github.com/ifahrentholz/eds-editorial/pull/50/commits/2e5dd215bc5c1107780dbfbd44e4b2eecf682177) :white_check_mark: * [047c46a](https://github.com/ifahrentholz/eds-editorial/pull/50/commits/047c46a32fa310e827603be98bc2c2147fac37cd) :white_check_mark: * [78726a6](https://github.com/ifahrentholz/eds-editorial/pull/50/commits/78726a637bf209b33c6c6bbc61f8316eb7a67746) :white_check_mark:

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