Adds nightly GHA workflow to test build; Add nightly workflow badge to README.md (#155)

Author: jwaldrop107

.github/workflows/nightly.yaml

@@ -0,0 +1,26 @@
+# Copyright 2025 NWChemEx-Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+name: Nightly Workflow
+
+on:
+  schedule:
+    - cron: "0 6 * * *" # Every day at 06:00 UTC (00:00 CST)
+
+jobs:
+  test_library:
+    uses: NWChemEx/.github/.github/workflows/test_nwx_library.yaml@master
+    with:
+      compilers: '["gcc-14", "clang-18"]'

README.md

@@ -14,14 +14,17 @@
   ~ limitations under the License.
 -->
 
-[![Actions](https://github.com/NWChemEx/ParallelZone/workflows/C_C++_CI/badge.svg)](https://github.com/NWChemEx/ParallelZone)
-
 <!-- TODO: Uncomment when code coverage works again
 [![Codecov](https://codecov.io/github/NWChemEx/ParallelZone/branch/master/graphs/sunburst.svg?token=gdemefzIU7)](https://codecov.io/github/NWChemEx/ParallelZone/branch/master)
 -->
 
 # ParallelZone
 
+[![Nightly Workflow](https://github.com/NWChemEx/ParallelZone/actions/workflows/nightly.yaml/badge.svg)](https://github.com/NWChemEx/ParallelZone/actions/workflows/nightly.yaml)
+<!-- TODO: Uncomment when code coverage works again
+[![Codecov](https://codecov.io/github/NWChemEx/ParallelZone/branch/master/graphs/sunburst.svg?token=gdemefzIU7)](https://codecov.io/github/NWChemEx/ParallelZone/branch/master)
+-->
+
 ParallelZone is a parallel
 [runtime system](https://en.wikipedia.org/wiki/Runtime_system) designed to be
 useful for object-oriented, task-based, scientific software. ParallelZone is
@@ -32,7 +35,7 @@ project).
 A more detailed, user-centric, description of the project can be found
 [here](https://nwchemex.github.io/ParallelZone/about.html).
 
-# Features
+## Features
 
 - Object-oriented C++ bindings to MPI.
 - Logging primitives.