feat: add schema user create and remove (#8494)

# Which Problems Are Solved

Added functionality that user with a userschema can be created and
removed.

# How the Problems Are Solved

Added logic and moved APIs so that everything is API v3 conform.

# Additional Changes

- move of user and userschema API to resources folder
- changed testing and parameters
- some renaming

# Additional Context

closes #7308

---------

Co-authored-by: Elio Bischof <elio@zitadel.com>

docs/docusaurus.config.js

@@ -317,7 +317,7 @@ module.exports = {
             },
           },
           user_schema_v3: {
-            specPath: ".artifacts/openapi/zitadel/user/schema/v3alpha/user_schema_service.swagger.json",
+            specPath: ".artifacts/openapi/zitadel/resources/userschema/v3alpha/user_schema_service.swagger.json",
             outputDir: "docs/apis/resources/user_schema_service_v3",
             sidebarOptions: {
               groupPathsBy: "tag",
@@ -325,7 +325,7 @@ module.exports = {
             },
           },
           user_v3: {
-            specPath: ".artifacts/openapi/zitadel/user/v3alpha/user_service.swagger.json",
+            specPath: ".artifacts/openapi/zitadel/resources/user/v3alpha/user_service.swagger.json",
             outputDir: "docs/apis/resources/user_service_v3",
             sidebarOptions: {
               groupPathsBy: "tag",