fix: Remove type from ModuleDefaults, combine unions

fetchModuleSchemas.js

@@ -21,7 +21,7 @@ for (const module of modules) {
     text = text // add `...ModuleDefaults;` after the model type
         .split("\n")
         .flatMap(line => {
-            return line.replace(/model ([A-Za-z]+) {/, "model $1 extends Module {");
+            return line.replace(/model ([A-Za-z]+) {/, "model $1 extends ModuleDefaults {");
             // if (line.trimStart().startsWith(`type: "${module.name}"`)) {
             //     return [
             //         line,

src-tsp/main.tsp

@@ -53,7 +53,7 @@ model Recipe {
    *
    * Each item in this list should have at least a `type:` or be specified to be included from an external file in the `recipes/` directory with `from-file:`.
    */
-  modules: Array<ModuleType | ImportedModule>;
+  modules: Array<Module | ImportedModule>;
 }
 
 @jsonSchema("stage-list-v1.json")
@@ -82,7 +82,7 @@ model Stage {
   /**
    * The list of modules to execute. The exact same syntax used by the main recipe `modules:` property.
    */
-  modules: Array<ModuleType | ImportedModule>;
+  modules: Array<Module | ImportedModule>;
 }
 
 @jsonSchema("module-list-v1.json")
@@ -92,17 +92,11 @@ model ModuleList {
    *
    * Each item in this list should have at least a `type:` or be specified to be included from an external file in the `recipes/` directory with `from-file:`.
    */
-  modules: Array<ModuleType | ImportedModule>;
+  modules: Array<Module | ImportedModule>;
 }
 
 @jsonSchema("module-v1.json")
-union ModuleType {
-  normal: NormalModules,
-  custom: CustomModule,
-}
-
-@discriminator("type")
-union NormalModules {
+union Module {
   akmods: AkmodsModule,
   bling: BlingModule,
   brew: BrewModule,
@@ -120,13 +114,11 @@ union NormalModules {
   signing: SigningModule,
   systemd: SystemdModule,
   yafti: YaftiModule,
+  custom: CustomModule,
 }
 
 @discriminator("type")
-model Module {
-  /** This is not a built-in module. */
-  type: string;
-
+model ModuleDefaults {
   /** Whether to disabling caching for this layer.
    * https://blue-build.org/reference/module/#no-cache-optional
    */