Added a namespaces plugin that allows generating namespaces and automatically adds reflections in a path pattern to the namespace.
This is particularly useful for the workflows reference, as workflows under the `**/packages/core/core-flows/**/workflows/**` path pattern are shown under a Workflows title, and steps under the path pattern `**/packages/core/core-flows/**/steps/**` are shown under a Steps title.
Upgrade typedoc to v0.26 + make changes based on the update
Note: This update produces an error when generating model references when the models use the `createPsqlIndexStatementHelper` decorator. As this isn't a breaking error, and as we'll move to DML in the future, it's not necessary to spend time on a fix.
