Add flutter upgrade script

Author: brianegan

scripts/update_flutter.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# This script loops through subdirectories to find Flutter projects,
+# cleans them by removing platform-specific folders,
+# recreates the Flutter project files, and then removes an unnecessary test file.
+
+# Find all directories one level deep from the current location.
+for dir in */; do
+  # Ensure we are only processing actual directories.
+  if [ -d "$dir" ]; then
+    echo "🔎 Processing directory: $dir"
+
+    pubspec_file="${dir}pubspec.yaml"
+
+    # 1. Check if pubspec.yaml exists and contains a 'flutter:' dependency.
+    if [ -f "$pubspec_file" ] && grep -q "flutter:" "$pubspec_file"; then
+      echo "  ✅ Found pubspec.yaml with a Flutter dependency."
+
+      # 2. Check if it's a valid project by looking for platform folders.
+      if [ -d "${dir}ios" ] || [ -d "${dir}android" ] || [ -d "${dir}web" ] || \
+         [ -d "${dir}macos" ] || [ -d "${dir}windows" ] || [ -d "${dir}linux" ]; then
+        
+        echo "  ✅ Found platform folders. Proceeding with cleanup..."
+
+        # Using a subshell to change directory, so we don't have to 'cd ..'
+        (
+          cd "$dir" || exit
+
+          # 3. Remove the old platform folders.
+          echo "  Removing platform folders: ios, android, web, macos, windows, linux"
+          rm -rf ios android web macos windows linux
+
+          # 4. Recreate the Flutter project in the current directory.
+          echo "  🚀 Running 'fvm flutter create .'"
+          fvm flutter create .
+
+          # 5. Remove the default widget test file.
+          widget_test_file="test/widget_test.dart"
+          if [ -f "$widget_test_file" ]; then
+            echo "  🗑️ Removing generated file: $widget_test_file"
+            rm "$widget_test_file"
+          fi
+
+          echo "  ✨ Successfully processed project in $dir"
+        )
+      else
+        echo "  ⏭️  Skipping: No platform folders found."
+      fi
+    else
+      echo "  ⏭️  Skipping: Not a Flutter project."
+    fi
+    echo "--------------------------------------------------"
+  fi
+done
+
+echo "All directories have been processed."