feat(motoko): add Motoko client generator

Adds a Motoko OpenAPI client generator targeting the Internet Computer
(IC) platform. Includes the codegen Java class, 6 Mustache templates,
unit tests, service-loader registration, generators.md listing, and
petstore sample configs for validation.

Author: ggreif

bin/configs/motoko-petstore-new.yaml

@@ -0,0 +1,9 @@
+generatorName: motoko
+outputDir: samples/client/petstore/motoko
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/motoko
+artifactId: petstore-client
+artifactVersion: 1.0.0
+additionalProperties:
+  hideGenerationTimestamp: "true"
+  useDfx: true

bin/configs/motoko-petstore-nodfx.yaml

@@ -0,0 +1,9 @@
+generatorName: motoko
+outputDir: samples/client/petstore/motoko-nodfx
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/motoko
+artifactId: petstore-client-nodfx
+artifactVersion: 1.0.0
+additionalProperties:
+  hideGenerationTimestamp: "true"
+  useDfx: false

docs/generators.md

@@ -45,6 +45,7 @@ The following generators are available:
 * [k6 (beta)](generators/k6.md)  
 * [kotlin](generators/kotlin.md)  
 * [lua (beta)](generators/lua.md)  
+* [motoko (beta)](generators/motoko.md)  
 * [n4js (beta)](generators/n4js.md)  
 * [nim (beta)](generators/nim.md)  
 * [objc](generators/objc.md)