DOC-4259 separate Write-behind from Ingest

[andy-stark-redis]

DOC-4259

Basically, just moving the current Ingest folder up a level into the main RDI folder and moving Write-behind out into its own top-level section.

[github-actions[bot]]

Staging links:
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/develop/connect/insight/rdi-connector
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/architecture
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/data-denormalization
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/data-pipelines
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/data-type-handling
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/prepare-dbs/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/prepare-dbs/my-sql-mariadb
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/prepare-dbs/oracle
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/prepare-dbs/postgresql
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/prepare-dbs/sql-server
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/transform-examples/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/transform-examples/redis-hash-example
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/transform-examples/redis-json-example
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/transform-examples/redis-set-example
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/transform-examples/redis-sorted-set-example
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/data-pipelines/transform-examples/redis-stream-example
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/faq
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/installation/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/observability
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/quick-start-guide
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/rdi-archive
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/reference/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/reference/cli/
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/reference/cli/redis-di-add-context
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/reference/cli/redis-di-config-rdi
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/reference/cli/redis-di-delete-all-contexts
https://redis.io/docs/staging/DOC-4259-separate-wb-from-ingest/integrate/redis-data-integration/reference/cli/redis-di-delete-context

[andy-stark-redis]

@dwdougherty Heroic effort - thanks for reviewing such a long PR, very much appreciated :-) I didn't expect you to check the links, etc, but I got rid of any build link errors and I've checked the aliases quite carefully, so hopefully there shouldn't be too many problems.