* feat(execution-engine)!: canon stream map support [fixes VM-301]
Canon stream map is a CRDT-like map structure that contains a
canonicalized stream map and allows indexed access to its
contents. ATM CSM supports both strings and int64 keys.
* docs: README re-organized
* add repository structure
* fix docs
* docs: A few minor fixes following an earlier discussion
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Co-authored-by: vms <michail.vms@gmail.com>
