chore: update version to 1.0.0 and remove deprecated documentation

- Updated project version to 1.0.0 in pyproject.toml and VERSION file.
- Removed obsolete Juvix documentation files related to various node engines and subsystems to streamline the codebase.
- Adjusted mkdocs.yml to reflect the changes in documentation structure.

Author: jonaprieto

VERSION

@@ -1 +1 @@
-v0.2.0
+v1.0.0

docs/Package.juvix

@@ -6,7 +6,7 @@ import PackageDescription.V2 open;
 package : Package :=
   defaultPackage@{
     name := "nspec";
-    version := mkVersion 0 1 4;
+    version := mkVersion 1 0 0;
     dependencies :=
       [github "anoma" "juvix-stdlib" "v0.11.0"]
   };