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>

internal/query/user_schema.go

@@ -26,7 +26,6 @@ func (e *UserSchemas) SetState(s *State) {
 }
 
 type UserSchema struct {
-	ID string
 	domain.ObjectDetails
 	State                  domain.UserSchemaState
 	Type                   string
@@ -49,6 +48,10 @@ var (
 		name:  projection.UserSchemaIDCol,
 		table: userSchemaTable,
 	}
+	UserSchemaCreationDateCol = Column{
+		name:  projection.UserSchemaCreationDateCol,
+		table: userSchemaTable,
+	}
 	UserSchemaChangeDateCol = Column{
 		name:  projection.UserSchemaChangeDateCol,
 		table: userSchemaTable,
@@ -131,6 +134,7 @@ func NewUserSchemaStateSearchQuery(value domain.UserSchemaState) (SearchQuery, e
 func prepareUserSchemaQuery() (sq.SelectBuilder, func(*sql.Row) (*UserSchema, error)) {
 	return sq.Select(
 			UserSchemaIDCol.identifier(),
+			UserSchemaCreationDateCol.identifier(),
 			UserSchemaChangeDateCol.identifier(),
 			UserSchemaSequenceCol.identifier(),
 			UserSchemaInstanceIDCol.identifier(),
@@ -147,6 +151,7 @@ func prepareUserSchemaQuery() (sq.SelectBuilder, func(*sql.Row) (*UserSchema, er
 			var schema database.ByteArray[byte]
 			err := row.Scan(
 				&u.ID,
+				&u.CreationDate,
 				&u.EventDate,
 				&u.Sequence,
 				&u.ResourceOwner,
@@ -173,6 +178,7 @@ func prepareUserSchemaQuery() (sq.SelectBuilder, func(*sql.Row) (*UserSchema, er
 func prepareUserSchemasQuery() (sq.SelectBuilder, func(*sql.Rows) (*UserSchemas, error)) {
 	return sq.Select(
 			UserSchemaIDCol.identifier(),
+			UserSchemaCreationDateCol.identifier(),
 			UserSchemaChangeDateCol.identifier(),
 			UserSchemaSequenceCol.identifier(),
 			UserSchemaInstanceIDCol.identifier(),
@@ -195,6 +201,7 @@ func prepareUserSchemasQuery() (sq.SelectBuilder, func(*sql.Rows) (*UserSchemas,
 				u := new(UserSchema)
 				err := rows.Scan(
 					&u.ID,
+					&u.CreationDate,
 					&u.EventDate,
 					&u.Sequence,
 					&u.ResourceOwner,