build(tgbot-gen): Changes and additions required to generate the API client with auth (cookie)

I use a standard set of templates, changes are made in api-header.mustache and api-source.mustache. Their _old versions contain the originals. Additions are necessary for the header argument in the generated functions so that you can authenticate using cookies.

api/_build/my-cpp-templates/cpp-restsdk/licenseInfo.mustache

@@ -0,0 +1,15 @@
+/**
+ * {{{appName}}}
+ * {{{appDescription}}}
+ *
+ {{#version}}
+ * The version of the OpenAPI document: {{{.}}}
+ {{/version}}
+ {{#infoEmail}}
+ * Contact: {{{.}}}
+ {{/infoEmail}}
+ *
+ * NOTE: This class is auto generated by OpenAPI-Generator {{{generatorVersion}}}.
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */