Add reference/tools/ category with Dagger, ArgoCD CLI, Ansible, and Pulumi cards (#178)

## Summary

- Create `docs/reference/tools/` with four reference cards: Dagger (build engine), ArgoCD CLI (deployment workflows), Ansible (config management), and Pulumi (DNS/Tailscale IaC)
- Move `ansible/roles.md` → `tools/ansible.md`, broadened with CLI patterns and dry-run usage
- Update `reference.md` index: add "Tools" section, remove old "Ansible" section
- Update `update-documentation.md` to reflect Dagger build process (workflow steps, manual build recipe, runner environment)
- Update `adopt-dagger-ci.md` plan to note how-to articles were handled via reference card + existing how-to updates
- Fix all broken `[[roles]]` wiki-links across 5 files → `[[ansible]]`

## Verification

- `docs-check-links` ✓ — no broken wiki-links
- `docs-check-index` ✓ — all docs referenced in category index
- `docs-check-filenames` ✓ — no duplicate filenames
- All pre-commit hooks pass

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/178

docs/reference/reference.md

@@ -52,6 +52,15 @@ Host inventory and network configuration.
 - [[routing|Routing]] - DNS domains, port mappings
 - [[power]] - Battery-backed power chain
 
+## Tools
+
+Build, deployment, and IaC tool reference.
+
+- [[dagger]] - CI/CD build engine (Python SDK)
+- [[argocd-cli]] - ArgoCD CLI workflows
+- [[ansible]] - Configuration management for indri
+- [[pulumi]] - Infrastructure-as-Code (DNS, Tailscale ACLs)
+
 ## Kubernetes
 
 Cluster configuration and application registry.
@@ -61,12 +70,6 @@ Cluster configuration and application registry.
 - [[tailscale-operator]] - Tailscale ingress for k8s services
 - [[external-secrets]] - Secrets management
 
-## Ansible
-
-Configuration management for [[indri]]-hosted services.
-
-- [[roles]] - Available ansible roles
-
 ## Storage
 
 Network storage and backup configuration.