move flutter_filament plugin to federated structure

flutter_filament_federated/flutter_filament/ios/flutter_filament.podspec

@@ -0,0 +1,34 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint flutter_filament.podspec` to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'flutter_filament'
+  s.version          = '0.0.1'
+  s.summary          = 'A new flutter plugin project.'
+  s.description      = <<-DESC
+A new flutter plugin project.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/*', 'include/SwiftFlutterFilamentPlugin-Bridging-Header.h', 'include/ResourceBuffer.h'
+  s.public_header_files = 'include/SwiftFlutterFilamentPlugin-Bridging-Header.h', 'include/ResourceBuffer.h'
+  s.dependency 'Flutter' 
+  s.platform = :ios, '13.0'
+  s.static_framework = true
+  s.user_target_xcconfig = { 
+    'DEFINES_MODULE' => 'YES', 
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386', 
+    "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
+    'OTHER_CFLAGS' => '"-fvisibility=default" "$(inherited)"',
+  }
+
+  s.pod_target_xcconfig = { 
+    'DEFINES_MODULE' => 'YES', 
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386', 
+  }
+
+  s.swift_version = '5.0'
+end