TOML schemas

[jesseditson]

When editing an archival site in VSCode or another editor that supports TOML Schemas, it would be nice if you got validation on your objects and the archival types.

The archival repo would publish schemas for:

• manifest.toml
• objects.toml

Then, during build/rebuild, archival should emit toml schemas for each object definition in objects.toml.

[jesseditson]

TOML schemas are not widely supported, however, Even Better TOML (and many/most other editors) support toml schemas via JSON schemas. These are in turn supported by taplo.

We should be able to use the inheritance order as per https://taplo.tamasfe.dev/configuration/using-schemas.html#using-schemas to provide autocomplete in most editors.

[jesseditson]

It probably makes the most sense to provide these schemas via a VSCode extension for archival