Tricu 2.0.0

Sorry for squashing all of this but 🤷

demos/viewContracts/modules/README.md

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+# Module View Contract demo
+
+This demo shows producer-checked module export Views flowing into a consumer
+check as trusted View Contract evidence.
+
+```sh
+tricu check demos/viewContracts/modules/success.tri
+# ok
+
+tricu check demos/viewContracts/modules/failure.tri
+# symbol 3 (Util.toString application result) expected Bool but got String
+```
+
+`util.tri` is a local workspace module. During auto-build, its annotated exports
+are checked before the module manifest alias is published. The consumer then
+uses the manifest's View Contract metadata and View Tree export artifacts as
+module-boundary assumptions; compatibility is still judged by `lib/view.tri`.

demos/viewContracts/modules/failure.tri

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+!import "vc.demo.util" Util
+
+foo x@Bool =@Bool Util.toString x

demos/viewContracts/modules/success.tri

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+!import "vc.demo.util" Util
+
+foo x@Bool =@Bool Util.id x

demos/viewContracts/modules/tricu.workspace

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+module vc.demo.util = util.tri

demos/viewContracts/modules/util.tri

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+id x@Bool =@Bool x
+toString x@Bool =@String "ok"