Migrate multiplatform example

Author: simolus3

sqlite3/example/multiplatform/analysis_options.yaml renamed to examples/multiplatform/analysis_options.yaml

@@ -2,14 +2,15 @@ name: sqlite3_multiplatform_example
 description: Uses common interface to `sqlite3` on web and native platforms.
 version: 0.1.0
 publish_to: 'none'
+resolution: workspace
 
 environment:
-  sdk: ">=2.12.0 <4.0.0"
+  sdk: "^3.9.0"
 
 dependencies:
   path: ^1.8.3
   path_provider: ^2.1.1
   sqlite3: ^3.0.0-0
 
 dev_dependencies:
-  lints: ^3.0.0
+  lints: ^6.0.0

sqlite3/example/multiplatform/db/db.dart renamed to examples/multiplatform/db/db.dart

@@ -6,6 +6,7 @@ environment:
 
 workspace:
   - flutter_integration_tests
+  - multiplatform
 
 dependency_overrides:
   sqlite3:

sqlite3/example/multiplatform/db/sqlite3/native.dart renamed to examples/multiplatform/db/sqlite3/native.dart

@@ -96,7 +96,7 @@ An example for such web folder is in `example/web/` of this repo.
 To view the example, copy a compiled `sqlite3.wasm` file to `web/sqlite3.wasm` in this directory.
 Then, run `dart run build_runner serve example:8080` and visit `http://localhost:8080/web/` in a browser.
 
-Another `example/multiplatform/` uses common interface to `sqlite3` on web and native platforms.
+Another `../examples/multiplatform/` uses common interface to `sqlite3` on web and native platforms.
 To run this example, merge its files into a Flutter app.
 
 ### Sharing code between web and a Dart VM