build: use fvm

Author: deandreamatias

.fvmrc

@@ -0,0 +1,3 @@
+{
+  "flutter": "stable"
+}

.gitignore

@@ -19,7 +19,7 @@
 # The .vscode folder contains launch configuration and tasks you configure in
 # VS Code which you may wish to be included in version control, so this line
 # is commented out by default.
-#.vscode/
+.vscode/
 
 # Flutter/Dart/Pub related
 **/doc/api/
@@ -77,3 +77,6 @@ build/
 !**/ios/**/default.mode2v3
 !**/ios/**/default.pbxuser
 !**/ios/**/default.perspectivev3
+
+# FVM Version Cache
+.fvm/