Builder interface for History objects

[utterstep]

Also part of #882

Allow History to be created through typed builder interface, powered by typed-builder crate.

This allows to specify different required fields for a different scenarios:

1. entry, imported from shell history should have at least command and timestamp and may have some other fields specified, if shell history stores them
2. entry, caught by hook – has timestamp, command and cwd. These are only fields accessible at hook's start phase, all the other ones (duration, exit and such) are added after command is executed, on an instance, queried from DB by id.
3. entry, queried from DB. In this case all fields are required, as we're querying the whole object as stored from DB.

I've also added documentation for History and provided builders, and added _seal field to the History to ensure that it could not be erroneously constructed from outside without going through the builder, which enforces required constraints.

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Name	Status	Preview	Comments	Updated (UTC)
atuin	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 15, 2023 10:20am

[utterstep]

I'll create PRs with other changes from #882 after this PR is resolved, because they depend on changes from this one

[conradludgate]

Thanks, and sorry this took so long. I made some changes that would have been too complicated to try and explain.

I removed the HistorySeal as it's unnecessary pedantry, although I admire the effort for strict type safety

[utterstep]

Thanks for your help and attention :)