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

translations/de.json

@@ -1,6 +1,6 @@
 {
   "app": {
-    "name": "Dispensa Manager",
+    "name": "EverShelf",
     "loading": "Laden..."
   },
   "nav": {

translations/en.json

@@ -1,6 +1,6 @@
 {
   "app": {
-    "name": "Dispensa Manager",
+    "name": "EverShelf",
     "loading": "Loading..."
   },
   "nav": {

translations/it.json

@@ -1,6 +1,6 @@
 {
   "app": {
-    "name": "Dispensa Manager",
+    "name": "EverShelf",
     "loading": "Caricamento..."
   },
   "nav": {