rebrand: rename project from Dispensa Manager to EverShelf

- Update app name across all files (manifest, index.html, README, docs)
- Update contact email to evershelfproject@gmail.com
- Rename Docker service/container/volume to evershelf
- Rename localStorage keys: dispensa_* → evershelf_*
- Rename SQLite DB reference: dispensa.db → evershelf.db
- Update SSH remote to dadaloop82/EverShelf
- Update Apache conf file name to evershelf.conf
- Update CI workflow Docker image/container names
- Update cron job example path
- Add data/dispensa.db to .gitignore to prevent accidental commit

docs/openapi.yaml

@@ -1,8 +1,8 @@
 openapi: "3.1.0"
 info:
-  title: Dispensa Manager API
+  title: EverShelf API
   description: |
-    REST API for Dispensa Manager — a self-hosted pantry management system.
+    REST API for EverShelf — a self-hosted pantry management system.
     All endpoints use the query parameter `action` to determine the operation.
     
     **Base URL:** `api/index.php?action={action_name}`
@@ -14,7 +14,7 @@ info:
   version: "1.0.0"
   contact:
     name: Stimpfl Daniel
-    email: dadaloop82@gmail.com
+    email: evershelfproject@gmail.com
   license:
     name: MIT
     url: https://opensource.org/licenses/MIT