Cleanup CI and add manual trigger

Author: Butakus

.github/workflows/humble.yaml

@@ -7,6 +7,7 @@ on:
   push:
     branches:
       - humble
+  workflow_dispatch:
 jobs:
   build-and-test:
     runs-on: ubuntu-22.04

.github/workflows/humble_cron.yaml

@@ -7,6 +7,7 @@ on:
   push:
     branches:
       - jazzy
+  workflow_dispatch:
 jobs:
   build-and-test:
     runs-on: ubuntu-24.04

.github/workflows/jazzy.yaml

@@ -7,6 +7,7 @@ on:
   push:
     branches:
       - kilted
+  workflow_dispatch:
 jobs:
   build-and-test:
     runs-on: ubuntu-24.04

.github/workflows/jazzy_cron.yaml

@@ -7,6 +7,9 @@ on:
   push:
     branches:
       - rolling
+  schedule:
+      - cron: '0 0 * * 6'
+  workflow_dispatch:
 jobs:
   build-and-test:
     runs-on: ubuntu-24.04