Fix template generation error caused by duplicate project addition

[Copilot]

• Fix template generation error by removing duplicate post-action
• Add conditional directives to solution file for test project
• Update includeTest parameter description to clarify default behavior
• Verify default behavior includes tests
• Verify --includeTest false excludes tests
• Both scenarios build successfully

Original prompt

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This section details on the original issue you should resolve

<issue_title>Template is throwing an error on generation</issue_title>
<issue_description># Describe the bug
Errors generating template.

Steps to reproduce

dotnet new -i Carterws -o Sample

Expected behavior

No errors

• Dotnet version: net7.0
• Library version: 0.0.7
• OS version: windows
  </issue_description>

Comments on the Issue (you are @copilot in this section)

@Jaxelr Ill address this issue this week.

• Fixes Template is throwing an error on generation #182

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[Jaxelr]

@copilot the issue is that the solution always includes the tests project.

[Copilot]

@copilot the issue is that the solution always includes the tests project.

Correct - that was the root cause of the original error. The solution file always included the test project, so when the post-action tried to add it again, it failed with "Solution argument is misplaced."

The fix now makes the test project inclusion conditional using #if (includeTest) directives. Testing confirms:

• --includeTest true (default): test project is included in solution ✓
• --includeTest false: test project is excluded from solution ✓

Both scenarios now generate without errors.

[Jaxelr]

@copilot the default should be to include tests and just have an option to exclude tests.

[Copilot]

@copilot the default should be to include tests and just have an option to exclude tests.

Updated the parameter description to clarify that the default is to include tests. The behavior is now:

• Default: tests are included
• --includeTest false: tests are excluded

Commit: 7f35447

[Jaxelr]

@copilot rebase

[Copilot]

@copilot rebase

I'm unable to perform git rebase operations directly. The branch needs to be rebased manually or through GitHub's UI. The current branch copilot/fix-template-generation-error contains 4 commits with the template generation fixes.