docs: update deployment paths and bump version

- add deployment paths table to README
- update installation notes to reference deployment paths
- bump version to 1.1.5
- update nextcloud dependency range (33-35)
- update author homepage and remove email
- remove --prefer-dist flag in ci.yml
- delete img/app (copy).svg

.gitea/workflows/ci.yml

@@ -1,5 +1,9 @@
 name: CI
 
+# TODO: Check if we can remove composer.json — CI currently uses `composer install`
+# and `composer test` (wrappers around `phpunit` and `php -l`). If CI can use
+# direct commands, composer.json can be dropped (no runtime deps needed).
+
 on:
   push:
     branches:
@@ -24,7 +28,7 @@ jobs:
 
       - name: Install dependencies
         working-directory: ./nc_bot_webhooks
-        run: composer install --prefer-dist
+        run: composer install
 
       - name: Lint PHP files
         working-directory: ./nc_bot_webhooks