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>

tools/git/detect-platform.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+# detect-platform.sh - Detect git platform (Gitea or GitHub) for current repo
+# Usage: source detect-platform.sh && detect_platform
+#        or: ./detect-platform.sh (prints platform name)
+
+detect_platform() {
+    local remote_url
+    remote_url=$(git remote get-url origin 2>/dev/null)
+
+    if [[ -z "$remote_url" ]]; then
+        echo "error: not a git repository or no origin remote" >&2
+        return 1
+    fi
+
+    # Check for GitHub
+    if [[ "$remote_url" == *"github.com"* ]]; then
+        PLATFORM="github"
+        export PLATFORM
+        echo "github"
+        return 0
+    fi
+
+    # Check for common Gitea indicators
+    # Gitea URLs typically don't contain github.com, gitlab.com, bitbucket.org
+    if [[ "$remote_url" != *"gitlab.com"* ]] && \
+       [[ "$remote_url" != *"bitbucket.org"* ]]; then
+        # Assume Gitea for self-hosted repos
+        PLATFORM="gitea"
+        export PLATFORM
+        echo "gitea"
+        return 0
+    fi
+
+    PLATFORM="unknown"
+    export PLATFORM
+    echo "unknown"
+    return 1
+}
+
+get_repo_info() {
+    local remote_url
+    remote_url=$(git remote get-url origin 2>/dev/null)
+
+    if [[ -z "$remote_url" ]]; then
+        echo "error: not a git repository or no origin remote" >&2
+        return 1
+    fi
+
+    # Extract owner/repo from URL
+    # Handles: git@host:owner/repo.git, https://host/owner/repo.git, https://host/owner/repo
+    local repo_path
+    if [[ "$remote_url" == git@* ]]; then
+        repo_path="${remote_url#*:}"
+    else
+        repo_path="${remote_url#*://}"
+        repo_path="${repo_path#*/}"
+    fi
+
+    # Remove .git suffix if present
+    repo_path="${repo_path%.git}"
+
+    echo "$repo_path"
+}
+
+get_repo_owner() {
+    local repo_info
+    repo_info=$(get_repo_info)
+    echo "${repo_info%%/*}"
+}
+
+get_repo_name() {
+    local repo_info
+    repo_info=$(get_repo_info)
+    echo "${repo_info##*/}"
+}
+
+# If script is run directly (not sourced), output the platform
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    detect_platform
+fi