Generate api client with openapi-generator (#3)

* Generate api client with openapi-generator

* Add wrapper struct

* Add basic example

scripts/generate.ps1

@@ -0,0 +1,10 @@
+#!/usr/bin/env pwsh
+
+java -jar ./vendor/openapi-generator/openapi-generator-cli.jar generate `
+    -i https://api.tribufu.com/openapi.json `
+    -g rust `
+    -o . `
+    --global-property apis,models,supportingFiles,apiDocs=false,modelDocs=false,apiTests=false,modelTests=false `
+    --additional-properties=packageName=tribufu,library=reqwest-trait,supportAsync=true,preferUnsignedInt=true `
+    --openapi-normalizer SET_TAGS_FOR_ALL_OPERATIONS=TribufuGenerated `
+    --skip-validate-spec