feat(ci): add custom CI template for improved pipeline

Adds a custom CI template from the unboundsoftware repository to 
enhance the pipeline configuration. This change aims to improve 
consistency and reuse of CI settings across projects, streamlining 
the development workflow.

.gitlab-ci.yml

@@ -1,5 +1,7 @@
 include:
 - template: 'Workflows/MergeRequest-Pipelines.gitlab-ci.yml'
+- project: unboundsoftware/ci-templates
+  file: Defaults.gitlab-ci.yml
 
 stages:
   - build