docs: add Brazilian Portuguese and Norwegian Nynorsk languages

docs/.vitepress/config.ts

docs/src/.i18n-filter

docs/src/ar/contributing/_category_.json

docs/src/ar/contributing/guidelines.md

docs/src/ar/contributing/setup-development.md

docs/src/ar/getting-started/_category_.json

docs/src/br/contributing/_category_.json

docs/src/br/contributing/guidelines.md

docs/src/br/contributing/setup-development.md

docs/src/br/getting-started/_category_.json

docs/src/contributing/setup-development.md

docs/src/de/contributing/_category_.json

docs/src/de/contributing/guidelines.md

docs/src/de/contributing/setup-development.md

docs/src/de/getting-started/_category_.json

docs/src/el/contributing/_category_.json

docs/src/el/contributing/guidelines.md

docs/src/el/contributing/setup-development.md

docs/src/el/getting-started/_category_.json

docs/src/es/contributing/_category_.json