The file of a custom dialog is named after the dialog name from the
script, which is free text. On Windows, a name like "Install under NT?"
is not a valid filename, so writing the file threw an IOException and
stopped the extraction.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This change looks dramatic, but it's just separating out the already-split namespaces into separate top-level folders. In theory, every single one could be built into their own Nuget package. `SabreTools.Serialization` still builds the normal Nuget package that is used by all other projects and includes all namespaces.
