add plugin camera desktop

plugins/camera_desktop/example/macos/Podfile

@@ -0,0 +1,62 @@
+platform :osx, '10.15'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'ephemeral', 'Flutter-Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure \"flutter pub get\" is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Flutter-Generated.xcconfig, then run \"flutter pub get\""
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_macos_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+
+  flutter_install_all_macos_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_macos_build_settings(target)
+  end
+
+  # media_kit_video ships an xcconfig where GCC_PREPROCESSOR_DEFINITIONS contains
+  # "$(inherited)" twice, which expands the build-config macros (POD_CONFIGURATION_*,
+  # DEBUG) twice and triggers "macro redefined" warnings. Strip the duplicate.
+  Dir.glob(File.join(installer.sandbox.root, '**', '*.xcconfig')).each do |xcconfig|
+    contents = File.read(xcconfig)
+    fixed = contents.gsub(/^(GCC_PREPROCESSOR_DEFINITIONS\s*=\s*)(.*)$/) do
+      prefix, value = $1, $2
+      seen_inherited = false
+      tokens = value.split(/\s+/).reject do |tok|
+        if tok == '$(inherited)' || tok == '"$(inherited)"'
+          next true if seen_inherited
+          seen_inherited = true
+        end
+        false
+      end
+      "#{prefix}#{tokens.join(' ')}"
+    end
+    File.write(xcconfig, fixed) if fixed != contents
+  end
+end