Initial commit: RustDesk 1.4.7 macOS desktop port

- Filled empty libs/hbb_common/ submodule (cloned from rustdesk/hbb_common)
- Patched Flutter 3.44 / Dart 3.12 compatibility:
  * flutter/lib/generated_bridge.dart: asTypedList with cast<>, DartPort=Int64
  * flutter/lib/common.dart: DialogTheme->DialogThemeData, TabBarTheme->TabBarThemeData
  * flutter/pubspec.yaml: extended_text 14.0.0->15.0.2, google_fonts override 5.0.0
  * flutter/macos/Runner/Configs/Release.xcconfig: EXCLUDED_ARCHS=x86_64
- Build verified: cargo check + cargo build --features flutter + cargo build --release --features flutter
- Verified flutter build macos --debug and --release both produce working .app
- Verified .dmg installer (27MB arm64) created via hdiutil
- Build deps: Xcode 26.5, CocoaPods 1.16.2, Flutter 3.44, VCPKG arm64-osx

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -0,0 +1,55 @@
+name: 🐞 Bug report
+description: Thanks for taking the time to fill out this bug report! Please fill the form in **English**
+labels: ["bug"]
+body:
+  - type: textarea
+    id: desc
+    attributes:
+      label: Bug Description
+      description: A clear and concise description of what the bug is (if it's a keyboard issue, provide the keyboard mode you're using. e.g. legacy, map, translate)
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: How to Reproduce
+      description: What steps can we take to reproduce this behavior?
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected Behavior
+      description: A clear and concise description of what you expected to happen
+    validations:
+      required: true
+  - type: input
+    id: os
+    attributes:
+      label: Operating system(s) on local (controlling) side and remote (controlled) side
+      description: What operating system(s) do you see this bug on? local (controlling) side -> remote (controlled) side.
+      placeholder: |
+        Windows 10 -> osx
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: RustDesk Version(s) on local (controlling) side and remote (controlled) side
+      description: What RustDesk version(s) do you see this bug on? local (controlling) side -> remote (controlled) side.
+      placeholder: |
+        1.1.9 -> 1.1.8
+    validations:
+      required: true
+  - type: textarea
+    id: screenshots
+    attributes:
+      label: Screenshots
+      description: Please add screenshots to help explain your problem, if applicable, please upload video.
+    validations:
+      required: true
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional Context
+      description: Add any additonal context about the problem here