The jsModuleExtensionRegExp property is generic enough that it should go into Uize.Build.Util and not UizeSite.Build.Util.
Migrated UizeSite.Build.Files.JsModules to Uize.Build.Files.JsModules so that it can be shared by other site projects that use UIZE.
The UizeSite.Build.ListJsModules script was generic enough and potentially useful to any site using UIZE, so it gets migrated to the Uize namespace as Uize.Build.ListJsModules.
Chipping away at factoring out the file builder URL handlers from the UizeSite.Build.File mega module, partly in order to make the code more magageable and maintainable, but also to allow some of the URL handlers to be used in composing a file builder service adapter for other site projects, since numerous of them could be useful.