main
imdiag/tests/docs: use RFC5737 test IP in samples
doc: restructure templates docs into hub and refs
template: add jsonftree option for nested jsonf output
Apply suggested fix to doc/source/reference/templates/templates-reserved-names.rst from Copilot Autofix
rainerscript: accept hex object string escapes
doc: clarify JSON array rendering
doc: improve subtree, list template documentation