docs(readme): document .csproj usage and UNITY_MANAGED_PATH advanced config#34

NormandErwan wants to merge 1 commit into

claude/analyze-repo-issues-Ok1RZNormandErwan/DocFxForUnity:claude/analyze-repo-issues-Ok1RZfrom

claude/update-readme-advanced-path-YxwfvNormandErwan/DocFxForUnity:claude/update-readme-advanced-path-YxwfvCopy head branch name to clipboard