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/tools/argocd-cli.md

@@ -0,0 +1,54 @@
+---
+title: ArgoCD CLI
+modified: 2026-02-12
+tags:
+  - reference
+  - gitops
+  - argocd
+---
+
+# ArgoCD CLI
+
+Command-line workflows for deploying and managing applications via [[argocd]].
+
+## CLI Commands
+
+```bash
+argocd app list                # List all applications and sync status
+argocd app get <app>           # Show app details, health, and resources
+argocd app diff <app>          # Preview what would change on sync
+argocd app sync <app>          # Apply pending changes
+argocd app sync apps           # Sync the app-of-apps (picks up new Application manifests)
+```
+
+## Login
+
+```bash
+argocd login argocd.ops.eblu.me \
+  --username admin \
+  --password "$(op read 'op://vg6xf6vvfmoh5hqjjhlhbeoaie/srogeebssulhtb6tnqd7ls6qey/password')"
+```
+
+## Branch-Testing Workflow
+
+Test changes from a feature branch before merging:
+
+```bash
+# 1. Point the app at your branch
+argocd app set <service> --revision <branch>
+
+# 2. Sync to deploy the branch version
+argocd app sync <service>
+
+# 3. Test the changes...
+
+# 4. After merge, reset to main and sync
+argocd app set <service> --revision main
+argocd app sync <service>
+```
+
+## Related
+
+- [[argocd]] — Service reference (URLs, credentials, sync policy)
+- [[apps]] — Full application registry
+- [[forgejo]] — Git source