chore: remove redundant function call for sync.Once

fix: separate signal and timeout cancel, and close both when run cmd exits

chore: remove duplicate validation log statement

docs: move demo gif back to public

chore: simplify resolving file access

fix: cancel the run context after the command is run

fix: use atomic writes for storing files

docs: move demo gif from public to src/assets

ci: fix test workflow

lint: update .golangci.yml

ci: setup lint and tests on actions, build all binaries

docs: add documentation for library and integrations

docs: add astro component to fetch the latest github release

docs: add library reference to the readme

docs: fix the binary download url