Make prototype of Census builder with support of Spatial data

[pablo-gar]

Scope

The prototype builder should be able to:

1. Take the input example data (see below)
2. Wrangle each component into the correct objects and structure according to the draft Census schema.
3. Output a test spatial Census build.

Relevant information

Input example data

The h5ads described in this document.

Census Visium spatial test datasets

@prathapsridharan familiarity with the CELLxGENE Dataset schema 5.1.0 is necessary.

Census spatial schema

Please top-comment in this ticket for the schema text. See last comment for an schematic of the latest iteration of the schema.

TileDB-SOMA implementation

Please become familiar with the Spatial proposal: Proposed SOMA Spatial Support

To implement the Census schema in the builder please use the branch spatial from somacore.