move workflow actions to .github for use on both platforms

.github/workflows/zig-mach.yaml

@@ -1,6 +1,8 @@
 name: AWS-Zig Build
 run-name: ${{ github.actor }} building AWS Zig SDK
 on:
+  schedule:
+    - cron: '0 12 * * *' # noon UTC, 4AM Pacific
   push:
     branches:
       - 'zig-develop*'
@@ -8,7 +10,7 @@ env:
   ACTIONS_RUNTIME_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   ACTIONS_RUNTIME_URL: ${{ env.GITHUB_SERVER_URL }}/api/actions_pipeline/
 jobs:
-  build-mach-latest:
+  build-zig-nightly:
     runs-on: ubuntu-latest
     # Need to use the default container with node and all that, so we can
     # use JS-based actions like actions/checkout@v3...

README.md

@@ -1,7 +1,12 @@
 AWS SDK for Zig
 ===============
 
+[Last Mach Nominated Zig Version](https://machengine.org/about/nominated-zig/):
+
 [![Build Status: Zig 0.12.0-dev.2063+804cee3b9](https://actions-status.lerch.org/lobo/aws-sdk-for-zig/zig-mach)](https://git.lerch.org/lobo/aws-sdk-for-zig/actions?workflow=zig-mach.yaml&state=closed)
+
+[Nightly Zig](https://ziglang.org/download/):
+
 [![Build Status: Zig Nightly](https://actions-status.lerch.org/lobo/aws-sdk-for-zig/zig-nightly)](https://git.lerch.org/lobo/aws-sdk-for-zig/actions?workflow=zig-nightly.yaml&state=closed)
 
 **NOTE: THIS SDK IS CURRENTLY UNUSABLE FOR SEVERAL IMPORTANT AWS SERVICES