repo,graphql: get a ref from HEAD instead of a commit (#1552)

api/http: add support for ref+path to get a blob content (#1550)

graphql: replace GitRef.isDefault by Repository.head (#1551)

repo: ReadData return a reader, improve the http handler (#1549)

graphql: add tree-->lastcommit, further optimize history querying (#1547)

repo: add RepoBrowse features to support code browsing UIs (#1541)

webui: cleanups (#1539)

commands: wire context with signal handling from the root (#1538)

webui: improve the browser opening sequence (#1537)

graphql: connection to list repos (#1534)

feat(api): add a subscription for bugs (#1456)

ci: remove redundant workflow: mirror (#1530)

feat: use git-describe for setting the version string (#1522)

test: use work_items url for gitlab issues (#1529)

build(deps): bump github.com/go-git/go-git/v5 from 5.13.0 to 5.16.5 in the go_modules group across 1 directory (#1517)