Update MAGE docs based on old Docusarus docs

[kgolubic]

We have to update some of the MAGE docs. The docs that need to be merged into this repo:

• [master < T618] Add docs for date module docs#999
• [master < E-add-label-docs] Add documentation for label module docs#996
• [master < MAGE-text] Add MAGE text query module docs docs#997

[kgolubic]

Note: Also we need to add this changes https://github.com/memgraph/docs/pull/1007/files

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• change path for text.md from /python to /cpp in Release notes.