Refactor the way the releases are built

This workflow is not manually triggered and can create automatically the appropriate
tag. The build number is not increase to the next multiple of ten, to stay in sync with
the iOS releases, which seem to cause more trouble and often need reuploads.

The individual steps have been moved out to their own files, for better readability.

We also now build the app for all supported platforms.

macos/Podfile.lock

@@ -14,20 +14,21 @@ PODS:
   - shared_preferences_foundation (0.0.1):
     - Flutter
     - FlutterMacOS
-  - sqlite3 (3.47.0):
-    - sqlite3/common (= 3.47.0)
-  - sqlite3/common (3.47.0)
-  - sqlite3/dbstatvtab (3.47.0):
+  - sqlite3 (3.49.1):
+    - sqlite3/common (= 3.49.1)
+  - sqlite3/common (3.49.1)
+  - sqlite3/dbstatvtab (3.49.1):
     - sqlite3/common
-  - sqlite3/fts5 (3.47.0):
+  - sqlite3/fts5 (3.49.1):
     - sqlite3/common
-  - sqlite3/perf-threadsafe (3.47.0):
+  - sqlite3/perf-threadsafe (3.49.1):
     - sqlite3/common
-  - sqlite3/rtree (3.47.0):
+  - sqlite3/rtree (3.49.1):
     - sqlite3/common
   - sqlite3_flutter_libs (0.0.1):
+    - Flutter
     - FlutterMacOS
-    - sqlite3 (~> 3.47.0)
+    - sqlite3 (~> 3.49.1)
     - sqlite3/dbstatvtab
     - sqlite3/fts5
     - sqlite3/perf-threadsafe
@@ -46,7 +47,7 @@ DEPENDENCIES:
   - path_provider_foundation (from `Flutter/ephemeral/.symlinks/plugins/path_provider_foundation/darwin`)
   - rive_common (from `Flutter/ephemeral/.symlinks/plugins/rive_common/macos`)
   - shared_preferences_foundation (from `Flutter/ephemeral/.symlinks/plugins/shared_preferences_foundation/darwin`)
-  - sqlite3_flutter_libs (from `Flutter/ephemeral/.symlinks/plugins/sqlite3_flutter_libs/macos`)
+  - sqlite3_flutter_libs (from `Flutter/ephemeral/.symlinks/plugins/sqlite3_flutter_libs/darwin`)
   - url_launcher_macos (from `Flutter/ephemeral/.symlinks/plugins/url_launcher_macos/macos`)
   - video_player_avfoundation (from `Flutter/ephemeral/.symlinks/plugins/video_player_avfoundation/darwin`)
 
@@ -70,25 +71,25 @@ EXTERNAL SOURCES:
   shared_preferences_foundation:
     :path: Flutter/ephemeral/.symlinks/plugins/shared_preferences_foundation/darwin
   sqlite3_flutter_libs:
-    :path: Flutter/ephemeral/.symlinks/plugins/sqlite3_flutter_libs/macos
+    :path: Flutter/ephemeral/.symlinks/plugins/sqlite3_flutter_libs/darwin
   url_launcher_macos:
     :path: Flutter/ephemeral/.symlinks/plugins/url_launcher_macos/macos
   video_player_avfoundation:
     :path: Flutter/ephemeral/.symlinks/plugins/video_player_avfoundation/darwin
 
 SPEC CHECKSUMS:
-  file_selector_macos: cc3858c981fe6889f364731200d6232dac1d812d
-  flutter_zxing: ea030278aa2a051cd81a5b0053be9d0569d11c9a
+  file_selector_macos: 6280b52b459ae6c590af5d78fc35c7267a3c4b31
+  flutter_zxing: 91e9d17c79c60860450e8879cced0ec54f6a2601
   FlutterMacOS: 8f6f14fa908a6fb3fba0cd85dbd81ec4b251fb24
-  package_info_plus: 12f1c5c2cfe8727ca46cbd0b26677728972d9a5b
-  path_provider_foundation: 2b6b4c569c0fb62ec74538f866245ac84301af46
-  rive_common: 0f0aadf670f0c6a7872dfe3e6186f112a5319108
-  shared_preferences_foundation: fcdcbc04712aee1108ac7fda236f363274528f78
-  sqlite3: 0aa20658a9b238a3b1ff7175eb7bdd863b0ab4fd
-  sqlite3_flutter_libs: f0b7a85544d8bac7b8bac12eac7d05bcfdd786d0
-  url_launcher_macos: c82c93949963e55b228a30115bd219499a6fe404
-  video_player_avfoundation: 7c6c11d8470e1675df7397027218274b6d2360b3
+  package_info_plus: f0052d280d17aa382b932f399edf32507174e870
+  path_provider_foundation: 080d55be775b7414fd5a5ef3ac137b97b097e564
+  rive_common: ea79040f86acf053a2d5a75a2506175ee39796a5
+  shared_preferences_foundation: 9e1978ff2562383bd5676f64ec4e9aa8fa06a6f7
+  sqlite3: fc1400008a9b3525f5914ed715a5d1af0b8f4983
+  sqlite3_flutter_libs: f8fc13346870e73fe35ebf6dbb997fbcd156b241
+  url_launcher_macos: 0fba8ddabfc33ce0a9afe7c5fef5aab3d8d2d673
+  video_player_avfoundation: 2cef49524dd1f16c5300b9cd6efd9611ce03639b
 
 PODFILE CHECKSUM: 0d3963a09fc94f580682bd88480486da345dc3f0
 
-COCOAPODS: 1.16.0
+COCOAPODS: 1.16.2