feat: rename rails/ to tools/ and add service tool suites

Rename the `rails/` directory to `tools/` for agent discoverability —
agents frequently failed to locate helper scripts due to the non-intuitive
directory name. Add backward-compat symlink `rails/ → tools/`.

New tool suites:
- Authentik: auth-token, user-list, user-create, group-list, app-list,
  flow-list, admin-status (8 scripts)
- Coolify: team-list, project-list, service-list, service-status, deploy,
  env-set (7 scripts)
- Woodpecker: pipeline-list, pipeline-status, pipeline-trigger (3 stubs)
- GLPI: session-init, computer-list, ticket-list, ticket-create, user-list
  (6 scripts)
- Health: stack-health.sh — stack-wide connectivity check

Infrastructure:
- Shared credential loader at tools/_lib/credentials.sh
- install.sh creates symlink + chmod on tool scripts
- All ~253 rails/ path references updated across 68+ files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills-local/mosaic-standards/SKILL.md

@@ -25,7 +25,7 @@ If wrappers are available, you may use:
 
 ## Enforcement Rules
 
-- Treat `~/.config/mosaic` as canonical for shared guides, rails, profiles, and skills.
+- Treat `~/.config/mosaic` as canonical for shared guides, tools, profiles, and skills.
 - Do not edit generated project views directly when the repo defines canonical data sources.
 - Pull/rebase before edits in shared repositories.
 - Run project verification commands before claiming completion.

skills-local/setup-cicd/SKILL.md

@@ -140,7 +140,7 @@ Ask these questions with lettered options (user can respond "1A, 2B, 3C"):
 If the project's `.woodpecker.yml` doesn't already have a `kaniko_setup` anchor in its `variables:` section, add it:
 
 ```bash
-~/.config/mosaic/rails/cicd/generate-docker-steps.sh --kaniko-setup-only --registry REGISTRY_HOST
+~/.config/mosaic/tools/cicd/generate-docker-steps.sh --kaniko-setup-only --registry REGISTRY_HOST
 ```
 
 This outputs:
@@ -158,7 +158,7 @@ Add this to the existing `variables:` block at the top of `.woodpecker.yml`.
 Use the generator script with the user's answers:
 
 ```bash
-~/.config/mosaic/rails/cicd/generate-docker-steps.sh \
+~/.config/mosaic/tools/cicd/generate-docker-steps.sh \
   --registry REGISTRY \
   --org ORG \
   --repo REPO \