Update PSWriteOffice OfficeIMO dependencies

[PrzemyslawKlys]

Summary

• Bump PSWriteOffice package-mode OfficeIMO dependencies to the May 1 OfficeIMO release, including OfficeIMO.Word 1.0.45 with the DOTX save fix.
• Gate development binary loading behind PSWRITEOFFICE_USE_DEVELOPMENT_BINARIES so packaged/import validation does not accidentally pick local Debug binaries.
• Make examples/tests import an explicit module manifest when provided, which helps validate packaged artifacts cleanly.

Validation

• dotnet restore Sources\PSWriteOffice\PSWriteOffice.csproj /p:OfficeIMORoot=.missing-officeimo
• dotnet build Sources\PSWriteOffice\PSWriteOffice.csproj -c Release /p:OfficeIMORoot=.missing-officeimo --no-restore
• dotnet build .\Sources\PSWriteOffice.sln -c Debug /p:OfficeIMORoot=.missing-officeimo
• pwsh -NoLogo -NoProfile -File .\PSWriteOffice.Tests.ps1 (59 passed)
• pwsh -NoLogo -NoProfile -File .\Build\Validate-PackagedArtefact.ps1 (imports passed in PowerShell 7 and Windows PowerShell; existing local binary-conflict advisories only)

Refs #76