CI: Add workflow dispatch triggers for all jobs

Useful for running just one platform on a branch.

.github/workflows/linux-appimage-build.yml

@@ -2,6 +2,7 @@ name: 🐧 Linux AppImage
 
 on:
   workflow_call:
+  workflow_dispatch:
 
 jobs:
   linux-x64-appimage-build:

.github/workflows/linux-flatpak-build.yml

@@ -11,6 +11,7 @@ on:
         required: false
         type: string
         default: "stable"
+  workflow_dispatch:
 
 jobs:
   linux-flatpak-build:

.github/workflows/macos-build.yml

@@ -2,6 +2,7 @@ name: 🍎 MacOS
 
 on:
   workflow_call:
+  workflow_dispatch:
 
 jobs:
   macos-build:

.github/workflows/main.yml

@@ -1,6 +1,7 @@
 name: Automated Builds
 
 on:
+  workflow_dispatch:
   pull_request:
     paths-ignore:
       - '**.md'

.github/workflows/windows-build.yml

@@ -2,6 +2,7 @@ name: 💻 Windows
 
 on:
   workflow_call:
+  workflow_dispatch:
 
 jobs:
   windows-x64-build: