Implement Census Visium Builder Prototype

[prathapsridharan]

This PR encapsulates a prototype of the census builder and integrate changes in tiledbsoma and somacore as it relates to spatial. As such this PR will be added to and evolve and therefore will remain in DRAFT mode

• 1127

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.46%. Comparing base (cfca649) to head (2cef2bb).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1165 +/- ## ========================================== - Coverage 91.11% 90.46% -0.66% ========================================== Files 77 77 Lines 5922 5933 +11 ========================================== - Hits 5396 5367 -29 - Misses 526 566 +40 ``` | [Flag](https://app.codecov.io/gh/chanzuckerberg/cellxgene-census/pull/1165/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/chanzuckerberg/cellxgene-census/pull/1165/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg) | `90.46% <100.00%> (-0.66%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg#carryforward-flags-in-the-pull-request-comment) to find out more.

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