feat(workflow): add Jinja2 template rendering node
* feature/20251219_myh: (4 commits)
feat(workflow): support variables wrapped with {{}} in assignment nodes, add input config example
feat(workflow): add default User-Agent and redirect following for HTTP request ...
fix(workflow): fix missing re-ranking for hybrid retrieval results in knowledge...
feat(workflow): add Jinja2 template rendering node
Signed-off-by: Eternity <1533512157@qq.com>
Reviewed-by: zhuwenhui5566@163.com <zhuwenhui5566@163.com>
Merged-by: zhuwenhui5566@163.com <zhuwenhui5566@163.com>
CR-link: https://codeup.aliyun.com/redbearai/python/redbear-mem-open/change/57