feat: add user registration endpoint and role-based default settings (#9277)

* feat(setting): add role-based default and registration settings (closed #feat/register-and-statistics)

- Added `AllowRegister` and `DefaultRole` settings to site configuration.
- Integrated dynamic role options for `DefaultRole` using `op.GetRoles`.
- Updated `setting.go` handlers to manage `DefaultRole` options dynamically.
- Modified `const.go` to include new site settings constants.
- Updated dependencies in `go.mod` and `go.sum` to support new functionality.

* feat(register-and-statistics): add user registration endpoint

- Added `POST /auth/register` endpoint to support user registration.
- Implemented registration logic in `auth.go` with dynamic role assignment.
- Integrated settings `AllowRegister` and `DefaultRole` for registration flow.
- Updated imports to include new modules: `conf`, `setting`.
- Adjusted user creation logic to use `DefaultRole` setting dynamically.

* feat(register-and-statistics): add user registration endpoint (#register-and-statistics)

- Added `POST /auth/register` endpoint to support user registration.
- Implemented registration logic in `auth.go` with dynamic role assignment.
- Integrated `AllowRegister` and `DefaultRole` settings for registration flow.
- Updated imports to include new modules: `conf`, `setting`.
- Adjusted user creation logic to use `DefaultRole` dynamically.

* feat(register-and-statistics): enhance role management logic (#register-and-statistics)

- Refactored CreateRole and UpdateRole functions to handle default role.
- Added dynamic role assignment logic in 'role.go' using conf settings.
- Improved request handling in 'handles/role.go' with structured data.
- Implemented default role logic in 'db/role.go' to update non-default roles.
- Modified 'model/role.go' to include a 'Default' field for role management.

* feat(register-and-statistics): enhance role management logic

- Refactor CreateRole and UpdateRole to handle default roles.
- Add dynamic role assignment using conf settings in 'role.go'.
- Improve request handling with structured data in 'handles/role.go'.
- Implement default role logic in 'db/role.go' for non-default roles.
- Modify 'model/role.go' to include 'Default' field for role management.

* feat(register-and-statistics): improve role handling logic

- Switch from role names to role IDs for better consistency.
- Update logic to prioritize "guest" for default role ID.
- Adjust `DefaultRole` setting to use role IDs.
- Refactor `getRoleOptions` to return role IDs as a comma-separated string.

* feat(register-and-statistics): improve role handling logic

server/router.go

@@ -61,6 +61,7 @@ func Init(e *gin.Engine) {
 	api.POST("/auth/login", handles.Login)
 	api.POST("/auth/login/hash", handles.LoginHash)
 	api.POST("/auth/login/ldap", handles.LoginLdap)
+	api.POST("/auth/register", handles.Register)
 	auth.GET("/me", handles.CurrentUser)
 	auth.POST("/me/update", handles.UpdateCurrent)
 	auth.GET("/me/sshkey/list", handles.ListMyPublicKey)