chat : implement minicpm5 parser (#24889)

• Add minicpm5 tool call parser

• Refactor MiniCPM5 PEG parser per review feedback

• Fix jinja min/max API to match Jinja2

• modify by review

• MiniCPM5: use autoparser for XML tool calls and fix grammar preserved-token triggers

• MiniCPM5: fix streaming tool-arg placeholder and remove alt XML markers

• skip min/max attribute tests in -py mode

• test-jinja: use real expected output for min/max attribute tests

• MiniCPM5: revert shared mapper and history fallbacks per review

Drop streaming tool-arg placeholder workarounds from the generic PEG mapper and restore strict tool-call argument JSON parsing so MiniCPM5 support stays limited to autoparser/diff-analyzer changes.

• chat : refactor minicpm5 back to dedicated parser

• cont : simplify grammar

• cont : refactor

• cont : fixes

• cont : rename template to openbmb-MiniCPM5-1B.jinja

• cont : add message delimiters

• cont : fix tests

Co-authored-by: zhangtao [email protected] Co-authored-by: 张涛 <>