Like PR 363 but the revert starts from latest `sprout` commit

[Connoropolous]

original context in #363 closes #356

Pospi said: More on the underlying issue resolved in this PR, for clarity:

• Significant simplification of the integrity zome modularity & composability for indexing zomes. You can now use a single integrity zome definition per DNA which means you don't have to extend those Rust crates to create new indexes. It also means a much reduced possibility for future cell data migrations.
• Fixes for storage efficiency for semantic and time indexes- both are now much less likely to create redundant / duplicate DHT links, and tolerant of scenarios where it is unavoidable (eg. network partitions).
• Code reorganisation pass to keep all semantic indexing libs under the same subdirectory tree
• Some bonus docs and error types cleanup with thanks to @Connoropolous for prompting :slightly_smiling_face:

[Connoropolous]

passing CI so let's go