Add workflow_dispatch to Swift, Python and C# CI Check (#882)

* Update swift.yml

* Update dotnet.yml

* Update python.yml

---------

Co-authored-by: Yudong Jin <krahets@163.com>

.github/workflows/dotnet.yml

@@ -10,6 +10,7 @@ on:
   pull_request:
     branches: [ "main" ]
     paths: ["codes/csharp/**/*.cs"]
+  workflow_dispatch:
 
 jobs:
   build:

.github/workflows/python.yml

@@ -10,6 +10,7 @@ on:
   pull_request:
     branches: ["main"]
     paths: ["codes/python/**/*.py"]
+  workflow_dispatch:
 
 permissions:
   contents: read

.github/workflows/swift.yml

@@ -10,6 +10,7 @@ on:
   pull_request:
     branches: ["main"]
     paths: ["codes/swift/**/*.swift"]
+  workflow_dispatch:
 
 jobs:
   build: