fix(kkrpc): restructure package exports and bump to 0.6.7

Updates kkrpc package to version 0.6.6

chore(kkrpc): bump version to 0.6.5

format

refactor: rename DestroyableIoInterface to IoInterface

chore(kkrpc): add type-checking scripts

feat(kkrpc): add traffic inspector with pluggable backends

ci: update node version

build(deps): upgrade vite to v6 and svelte plugin to v5 in examples

ci(npm-publish): use curl instead of npm view for version check

ci: debug

ci: enable pnpm caching and optimize publish workflows

docs(kkrpc): add video tutorial section to readme

ci: debug npm publish ci

feat(kkrpc): add dependencies for additional transport adapters