Update NugetReadme and gitattributes configuration

[stesee]

No description provided.

[Copilot]

Pull Request Overview

This PR updates documentation and git configuration to improve the project's presentation and development workflow. The changes remove a Codacy badge from the NuGet readme and modify line ending handling for project files.

• Removed Codacy badge and fork reference line from NuGet readme
• Updated .gitattributes to use auto line endings for .csproj files instead of enforced CRLF

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
OpenXmlPowerTools/docs/nugetReadme.md	Simplified readme by removing Codacy badge and fork reference
.gitattributes	Changed .csproj files from enforced CRLF to auto line endings with explanatory comment

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