Add PSModule workflow configuration and remove jscpd linter settings (#8)

This pull request introduces configuration changes to the repository,
primarily adding a new workflow configuration file and removing an old
linter configuration file.

Workflow configuration:

* Added `.github/PSModule.yml` to configure the Process-PSModule
workflow, specifying code coverage settings and providing commented
examples for additional test and build options.

Linter configuration:

* Removed `.github/linters/.jscpd.json`, eliminating the previous
configuration for the JSCPD code duplication linter.

Author: MariusStorhaug

.github/PSModule.yml

@@ -0,0 +1,21 @@
+# This file is used to configure the Process-PSModule workflow.
+# Reference:
+# - https://github.com/PSModule/Process-PSModule?tab=readme-ov-file#configuration
+
+Test:
+  CodeCoverage:
+    PercentTarget: 95
+#   TestResults:
+#     Skip: true
+#   SourceCode:
+#     Skip: true
+#   PSModule:
+#     Skip: true
+#   Module:
+#     Windows:
+#       Skip: true
+#     MacOS:
+#       Skip: true
+# Build:
+#   Docs:
+#     Skip: true