move stencil to pod

Currently this tasks modifies the current global dependencies to pull in stencil, this breaks projects which also pull in stencil or set their own version.

Please refactor task to use pods, which to keep stencil dependency isolated, and add `core.cache` to excludes.

Locate the task that currently modifies global dependencies to pull in stencil, then inspect how pods and dependency exclusions are handled in the project. Done means stencil is isolated through a pod and core.cache is included in the exclusions; verify the affected task behavior with the repository's available checks.

Written by the indexing model from the issue text.