chore: add mise tasks for observe, interpret, chart, and read

chore: gitignore PDF files

fix: add __main__ guard to print CLI for python -m invocation

fix: use raw passthrough for mise print task arguments

style: apply ruff formatting to print renderer

fix: add future annotations for runtime generic subscript compatibility

docs: add print feature to README and mise tasks

chore: lint, typecheck, and coverage for print feature

chore: add MIT license

chore: add logo to README and social preview image

chore: gitignore .coverage data file

chore: add mise task runner for unified dev tooling

docs: add development setup instructions to README