Rework workflow scheduling

- add scheduled-weekly.yml
- add scheduled-monthly.yml
- update project-analysis.yml
  - remove schedule
  - remove "on push"
  - apply jobs for PRs against ANY branch

refs atc0005/shared-project-resources#68

.github/workflows/project-analysis.yml

@@ -8,26 +8,10 @@
 name: Project Analysis
 
 on:
-  push:
-    branches: [master]
   pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [master]
-
     # `synchronized` seems to equate to pushing new commits to a linked branch
     # (whether force-pushed or not)
     types: [opened, synchronize]
-  schedule:
-    # ┌───────────── minute (0 - 59)
-    # │ ┌───────────── hour (0 - 23)
-    # │ │ ┌───────────── day of the month (1 - 31)
-    # │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
-    # │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
-    # │ │ │ │ │
-    # │ │ │ │ │
-    # │ │ │ │ │
-    # * * * * *
-    - cron: "19 2 * * 0"
 
 jobs:
   lint:

.github/workflows/scheduled-monthly.yml

@@ -0,0 +1,21 @@
+# See LICENSE file in this repo for license details.
+
+name: Scheduled Monthly
+
+on:
+  schedule:
+    # ┌───────────── minute (0 - 59)
+    # │ ┌───────────── hour (0 - 23)
+    # │ │ ┌───────────── day of the month (1 - 31)
+    # │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    # │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    # │ │ │ │ │
+    # │ │ │ │ │
+    # │ │ │ │ │
+    # * * * * *
+    - cron: "30 4 1 * *"
+
+jobs:
+  lint:
+    name: Monthly Tasks
+    uses: atc0005/shared-project-resources/.github/workflows/scheduled-monthly.yml@master

.github/workflows/scheduled-weekly.yml

@@ -0,0 +1,21 @@
+# See LICENSE file in this repo for license details.
+
+name: Scheduled Weekly
+
+on:
+  schedule:
+    # ┌───────────── minute (0 - 59)
+    # │ ┌───────────── hour (0 - 23)
+    # │ │ ┌───────────── day of the month (1 - 31)
+    # │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    # │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    # │ │ │ │ │
+    # │ │ │ │ │
+    # │ │ │ │ │
+    # * * * * *
+    - cron: "30 4 * * 0"
+
+jobs:
+  lint:
+    name: Weekly Tasks
+    uses: atc0005/shared-project-resources/.github/workflows/scheduled-weekly.yml@master