docs: link orchestration guide

Add the orchestration guide to the documentation landing page and Zensical navigation.\n\nCo-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

docs/content/index.md

@@ -38,6 +38,7 @@ Task-oriented deep dives into the pipeline's functionality.
 | [Skipping framework tests](guides/skipping-framework-tests.md) | Skip individual framework tests on a per-file basis. |
 | [Versioning and releases](guides/versioning-and-releases.md) | Label-driven versioning, prereleases, and what a release produces. |
 | [Validating before review](guides/validating-before-review.md) | The PSModule validation pass before a draft pull request is marked ready. |
+| [Module development orchestration](guides/module-development-orchestration.md) | Coordinate substantial work across an orchestrator session and narrowly scoped child sessions. |
 
 ## Reference
 

docs/zensical.toml

@@ -33,6 +33,7 @@ nav = [
     {"Skipping framework tests" = "guides/skipping-framework-tests.md"},
     {"Versioning and releases" = "guides/versioning-and-releases.md"},
     {"Validating before review" = "guides/validating-before-review.md"},
+    {"Module development orchestration" = "guides/module-development-orchestration.md"},
   ]},
   {"Reference" = [
     {"Module development foundations" = "reference/module-development-foundations.md"},