v1 materials API, entries API, supporting search, and metainfo extensions

Problem

For the next major version v0.11.x there will be some breaking changes introduced by new features:

• new section results: #470 (closed)
• new search index: #465 (closed)
• new apis: #408 (closed), #454 (closed), #503 (closed)
• more structural changes to the metainfo/archive #419 (closed)
• probably more

Since we cannot simply break things, we will need to find a way to operate v0.10 and v0.11 at the same time on the same data. This will effect the issues above.

Done

• merge v0 and v1 entries index
• use two v0 and v1 materials index
• elasticsearch extension for v1 indices, supports both entries and materials
• refactored search module into v0 and v1
• new v1 search based on pydantic API models
• generic and specific nested queries; e.g. support multiple dos (generic) and materials entries (specific)

TODO

• update v1 documentation
• update metainfo/elasticsearch extension documentation
• visualize searchable metainfo in metainfo browser
• aggregations on materials
• materials API for material entries
• EoS and such?
• specificity in query testing
• auto-update of materials index on aux operations: delete, publish, edit