* Organize docs: front and back end; custom predicates.
* Whoops forgot to hit save before git commit last time -- delete stuff moved out of values.md
* Update book/src/values.md
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Co-authored-by: Ahmad Afuni <root@ahmadafuni.com>
Extend merkletree spec, init SignedPod section, add typos checker in CI
- extend merkletree spec, converting old hand-drawn diagrams to drawio
diagrams, and adding new diagrams (related: #6)
- init SignedPod section (related: #2)
- initial draft of the types dictionary, set, array (related: #26)
- add typos checker in CI (and correct the ones that were detected)
Note on drawio diagrams: each image file contains the metadata to edit the diagram in the draw.io website.
