ci: enable manually running CI. (#32)

Author: 1uc

.github/workflows/ci.yml

@@ -5,6 +5,7 @@ concurrency:
   cancel-in-progress: ${{ github.ref == 'main' }}
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - master

.github/workflows/clang_format.yml

@@ -5,6 +5,7 @@ concurrency:
   cancel-in-progress: true
 
 on:
+  workflow_dispatch:
   pull_request:
     branches:
       - master

.github/workflows/version_file.yml

@@ -1,6 +1,7 @@
 name: HighFive Check Version File
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - master