Merge pull request #32 from oproto/feature/tag-groups-and-better-exam…

…ple-generation

docs: update changelog and task completion for tag groups and example…

Merge pull request #28 from oproto/feature/openapi-merge

feat(merge): add OpenAPI merge tool with core library and CLI

Merge pull request #22 from oproto/bugfix/build-props-project-url

chore(build): update package project URL to official domain