sparse-v2: design doc proposition for Sparse Patterns refactoring

[torquestomp]

Proposal for a Sparse Patterns rewrite, to address multiple feature gaps.
Looking for feedback and approval before moving forward with real changes.

Checklist

If applicable:

• I have updated CHANGELOG.md
• I have updated the documentation (README.md, docs/, demos/)
• I have updated the config schema (cli/src/config-schema.json)
• I have added tests to cover my changes

[PhilipMetzger]

Here are some initial comments. I'd also prefer if you structured it like one of the existing Design Docs, maybe the style of tracking-branches fits for this document. Oh and don't forget to add it to mkdocs.yml or it won't be in the design section of the website.

[PhilipMetzger]

I actually really like the design from the first revision on, it just really lacks context for a broader (non-Google3) audience.

[arxanas]

Maybe you could compare to Subversion's "externals" or https://github.com/josh-project/josh?

[PhilipMetzger]

LGTM, it's probably just missing a related work section. I'm going to leave the rest of the discussion in concerns to internal details to the respective stakeholders.

[torquestomp]

LGTM, it's probably just missing a related work section. I'm going to leave the rest of the discussion in concerns to internal details to the respective stakeholders.

Thanks for the review! Sorry for harping on any previously-discussed points; there was a lot to read through.
I'll do some touch-ups tomorrow before pinging the other convos.

[torquestomp]

Maybe you could compare to Subversion's "externals" or https://github.com/josh-project/josh?

Added the josh project to "related work"; I don't think Subversion's "externals" are related here.

[torquestomp]

LGTM, it's probably just missing a related work section. I'm going to leave the rest of the discussion in concerns to internal details to the respective stakeholders.

Added a "Related Work" section.