feat: get_code.dspy supports prepend_all=1 to add '全部' option

When prepend_all=1 is passed, insert {valueField:'', textField:'全部'}
as the first item in the result array. Used by InlineForm search fields.

wwwroot/get_code.dspy

@@ -23,5 +23,7 @@ debug(f'/appbase/get_code.dspy: {sql=}')
 
 async with db.sqlorContext(params_kw.dbname) as sor:
 	rs = await sor.sqlExe(sql, ns)
+	if params_kw.get('prepend_all') == '1':
+		rs.insert(0, {params_kw.valueField: '', params_kw.textField: '全部'})
 	return rs
 return []