Add missing @popperjs/core dependency

- Add @popperjs/core to importmap (required by tippy.js)
- Update all documentation to include the dependency
- Update version references to 1.1.1
- Fixes demo not working due to missing dependency

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: justalever

IMPORTMAP.md

@@ -8,11 +8,12 @@ This guide helps Rails developers set up railsui-stimulus with importmaps.
 
 ```ruby
 # Main package
-pin "railsui-stimulus", to: "https://unpkg.com/railsui-stimulus@1.1.0/dist/importmap/index.js"
+pin "railsui-stimulus", to: "https://unpkg.com/railsui-stimulus@1.1.1/dist/importmap/index.js"
 
 # Required dependencies
 pin "@hotwired/stimulus", to: "https://unpkg.com/@hotwired/stimulus@3.2.2/dist/stimulus.js"
 pin "tippy.js", to: "https://unpkg.com/tippy.js@6.3.7/dist/tippy.esm.js"
+pin "@popperjs/core", to: "https://unpkg.com/@popperjs/core@2.11.8/dist/esm/index.js"
 pin "flatpickr", to: "https://unpkg.com/flatpickr@4.6.13/dist/esm/index.js"
 pin "hotkeys-js", to: "https://unpkg.com/hotkeys-js@3.13.15/dist/hotkeys.esm.js"
 pin "stimulus-use", to: "https://unpkg.com/stimulus-use@0.52.2/dist/index.js"
@@ -108,6 +109,7 @@ pin_all_from "vendor/javascript/railsui-stimulus", under: "railsui-stimulus"
 # Dependencies (still need to be pinned)
 pin "@hotwired/stimulus", to: "https://unpkg.com/@hotwired/stimulus@3.2.2/dist/stimulus.js"
 pin "tippy.js", to: "https://unpkg.com/tippy.js@6.3.7/dist/tippy.esm.js"
+pin "@popperjs/core", to: "https://unpkg.com/@popperjs/core@2.11.8/dist/esm/index.js"
 pin "flatpickr", to: "https://unpkg.com/flatpickr@4.6.13/dist/esm/index.js"
 pin "hotkeys-js", to: "https://unpkg.com/hotkeys-js@3.13.15/dist/hotkeys.esm.js"
 pin "stimulus-use", to: "https://unpkg.com/stimulus-use@0.52.2/dist/index.js"
@@ -142,12 +144,12 @@ You can use different CDN providers if preferred:
 
 **jsDelivr:**
 ```ruby
-pin "railsui-stimulus", to: "https://cdn.jsdelivr.net/npm/railsui-stimulus@1.1.0/dist/importmap/index.js"
+pin "railsui-stimulus", to: "https://cdn.jsdelivr.net/npm/railsui-stimulus@1.1.1/dist/importmap/index.js"
 ```
 
 **JSPM:**
 ```ruby
-pin "railsui-stimulus", to: "https://ga.jspm.io/npm:railsui-stimulus@1.1.0/dist/importmap/index.js"
+pin "railsui-stimulus", to: "https://ga.jspm.io/npm:railsui-stimulus@1.1.1/dist/importmap/index.js"
 ```
 
 ## Need Help?

README.md

@@ -30,11 +30,12 @@ Rails 7+ ships with importmap-rails by default. This method doesn't require npm
 
 ```ruby
 # config/importmap.rb
-pin "railsui-stimulus", to: "https://unpkg.com/railsui-stimulus@1.1.0/dist/importmap/index.js"
+pin "railsui-stimulus", to: "https://unpkg.com/railsui-stimulus@1.1.1/dist/importmap/index.js"
 
 # Pin dependencies
 pin "@hotwired/stimulus", to: "https://unpkg.com/@hotwired/stimulus@3.2.2/dist/stimulus.js"
 pin "tippy.js", to: "https://unpkg.com/tippy.js@6.3.7/dist/tippy.esm.js"
+pin "@popperjs/core", to: "https://unpkg.com/@popperjs/core@2.11.8/dist/esm/index.js"
 pin "flatpickr", to: "https://unpkg.com/flatpickr@4.6.13/dist/esm/index.js"
 pin "hotkeys-js", to: "https://unpkg.com/hotkeys-js@3.13.15/dist/hotkeys.esm.js"
 pin "stimulus-use", to: "https://unpkg.com/stimulus-use@0.52.2/dist/index.js"

importmap.json

@@ -2,6 +2,7 @@
   "imports": {
     "@hotwired/stimulus": "https://unpkg.com/@hotwired/stimulus@3.2.2/dist/stimulus.js",
     "tippy.js": "https://unpkg.com/tippy.js@6.3.7/dist/tippy.esm.js",
+    "@popperjs/core": "https://unpkg.com/@popperjs/core@2.11.8/dist/esm/index.js",
     "flatpickr": "https://unpkg.com/flatpickr@4.6.13/dist/esm/index.js",
     "hotkeys-js": "https://unpkg.com/hotkeys-js@3.13.15/dist/hotkeys.esm.js",
     "stimulus-use": "https://unpkg.com/stimulus-use@0.52.2/dist/index.js"

index.html

@@ -34,6 +34,7 @@
           "@hotwired/stimulus": "https://unpkg.com/@hotwired/stimulus@3.2.2/dist/stimulus.js",
           "railsui-stimulus": "https://unpkg.com/railsui-stimulus@1.1.1/dist/importmap/index.js",
           "tippy.js": "https://unpkg.com/tippy.js@6.3.7/dist/tippy.esm.js",
+          "@popperjs/core": "https://unpkg.com/@popperjs/core@2.11.8/dist/esm/index.js",
           "flatpickr": "https://unpkg.com/flatpickr@4.6.13/dist/esm/index.js",
           "hotkeys-js": "https://unpkg.com/hotkeys-js@3.13.15/dist/hotkeys.esm.js",
           "stimulus-use": "https://unpkg.com/stimulus-use@0.52.2/dist/index.js"