commands: newDocsHelper encode integers as ints in generated YAML

commands: newDocsHelper encode integers as ints in generated YAML

Previously the JSON -> map roundtrip produced float64 values which caused the YAML encoder to emit integers like 404.0 instead of 404. Use the YAML encoder option yaml.AutoInt() so numbers that are integer-valued are encoded as integers.

This change affects the
ewDocsHelper command (commands/gen.go) where the docs data is written to docs/data/docs.yaml. After this change generated YAML will contain integer values (e.g. status: 404) instead of floats (e.g. status: 404.0).

Fixes #14122