chore: Improve repository with documentation, tests, and templates (#…

…13174)

Enhance documentation, scripts, and templates for better usability and
testing.

* **Documentation**
- Add detailed examples and explanations to
`packages/google-ads-admanager/docs/index.rst`.

* **Testing Scripts**
  - Enhance `ci/run_conditional_tests.sh` to include more test cases.
- Enhance `ci/run_single_test.sh` to include more linting and formatting
checks.

* **Issue Templates**
- Expand `.github/ISSUE_TEMPLATE/bug_report.yaml` with more fields and
guidance.
- Expand `.github/ISSUE_TEMPLATE/feature_request.yaml` with more fields
and guidance.

* **Dependency Management**
- Configure `renovate.json` to include more dependencies for automatic
updates.

---

For more details, open the [Copilot Workspace
session](https://copilot-workspace.githubnext.com/googleapis/google-cloud-python?shareId=44437e95-068d-430c-994e-16077e9e1dc0).

---------

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -91,3 +91,8 @@ body:
       pip list
       Package                     Version
       --------------------------- ------------------------
+- type: textarea
+  attributes:
+    label: Additional context
+    description: Add any other context about the problem here.
+    placeholder: Additional context

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -45,3 +45,15 @@ body:
     label: API client name and version
     description: If there's a particular API client for which this feature would be helpful, enter it here. Try `pip list | grep google`, which should give you a name corresponding to one of the packages listed [here](https://github.com/googleapis/google-cloud-python/tree/main/packages).
     placeholder: e.g. google-cloud-vision v3.7.2
+- type: textarea
+  attributes:
+    label: 'Use case'
+    description: Describe the use case or scenario where this feature would be helpful.
+    value: |
+      _e.g. This feature would be useful in a scenario where I need to process large amounts of data efficiently._
+- type: textarea
+  attributes:
+    label: 'Additional context'
+    description: Add any other context or information about the feature request here.
+    value: |
+      _e.g. This feature would help improve the performance of my application._

ci/run_conditional_tests.sh

@@ -15,7 +15,7 @@
 
 # This script requires the following environment variables to be set:
 # `BUILD_TYPE` should be one of ["presubmit", "continuous"]
-# `TEST_TYPE` should be one of ["lint", "lint_setup_py", "docs", "docfx", "prerelease"]
+# `TEST_TYPE` should be one of ["lint", "lint_setup_py", "docs", "docfx", "prerelease", "unit"]
 # `PY_VERSION` should be one of ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
 
 # `TEST_TYPE` and `PY_VERSION` are required by the script `ci/run_single_test.sh`