build: add regress weekly pipeline

This commit also adds manual dispatch for tests and setup

.github/workflows/regress.yml

@@ -1,6 +1,9 @@
 name: Regress
 
-on: workflow_dispatch
+on:
+  schedule:
+    - cron: 1 0 * * 0
+  workflow_dispatch:
 
 permissions:
   contents: read

.github/workflows/setup.yml

@@ -7,6 +7,7 @@ on:
   pull_request:
     branches:
       - master
+  workflow_dispatch:
 
 permissions:
   contents: read

.github/workflows/tests.yml

@@ -9,6 +9,7 @@ on:
       - master
   schedule:
     - cron: 1 0 * * *
+  workflow_dispatch:
 
 permissions:
   contents: read