Currently the scylla tools (`scylla-types` and `scylla-sstable`) have documentation in two places: high level documentation can be found at `docs/operating-scylla/admin-tools/scylla-{types,sstable}.rst`, while low level, more detailed documentation is embedded in the tool itself. This is especially pronounced for `scylla-sstable`, which only has a short description of its operations online, all details being found only in the command-line help.
We want to move away from this model, such that all documentation can be found online, with the command-line help being reserved to documenting how the various switches and flags work, on top of a short description of the operation and a link to the detailed online docs.
Closes#12284
* github.com:scylladb/scylladb:
tool/scylla-sstable: move documentation online
docs: scylla-sstable.rst: add sstable content section
docs: scylla-{sstable,types}.rst: drop Syntax section
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