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/apiexception-source.mustache

@@ -0,0 +1,41 @@
+{{>licenseInfo}}
+#include "{{packageName}}/ApiException.h"
+
+{{#apiNamespaceDeclarations}}
+namespace {{this}} {
+{{/apiNamespaceDeclarations}}
+
+ApiException::ApiException( int errorCode
+    , const utility::string_t& message
+    , std::shared_ptr<std::istream> content /*= nullptr*/ )
+    : web::http::http_exception( errorCode, message )
+    , m_Content(content)
+{
+}
+ApiException::ApiException( int errorCode
+    , const utility::string_t& message
+    , std::map<utility::string_t, utility::string_t>& headers
+    , std::shared_ptr<std::istream> content /*= nullptr*/ )
+    : web::http::http_exception( errorCode, message )
+    , m_Content(content)
+    , m_Headers(headers)
+{
+}
+
+ApiException::~ApiException()
+{
+}
+
+std::shared_ptr<std::istream> ApiException::getContent() const
+{
+    return m_Content;
+}
+
+std::map<utility::string_t, utility::string_t>& ApiException::getHeaders()
+{
+    return m_Headers;
+}
+
+{{#apiNamespaceDeclarations}}
+}
+{{/apiNamespaceDeclarations}}