Fix spelling in v6

.github/.codespellignore

.github/.codespellignore_lines

.github/workflows/codespell.yml

src/api/api.c

src/api/auth.c

src/api/docs/content/specs/auth.yaml

src/api/docs/content/specs/clients.yaml

src/api/docs/content/specs/domains.yaml

src/api/docs/content/specs/groups.yaml

src/api/docs/content/specs/lists.yaml

src/api/docs/content/specs/search.yaml

src/api/docs/content/specs/stats.yaml

src/api/docs/docs.c

src/api/network.c

src/api/stats.c

src/api/stats_database.c

src/api/teleporter.c

src/config/config.c

src/config/legacy_reader.c

src/config/toml_helper.c