Update : mkdocs documentation

.gitignore

docs/docs/api-catalog-entity-management.md

docs/docs/api-catalog-property-discovery.md

docs/docs/api-catalog-source-management.md

docs/docs/api-catalog-timeseries-management.md

docs/docs/api-catalog-timeseries.md

docs/docs/api-catalog.md

docs/docs/blog/index.md

docs/docs/entities.md

docs/docs/index.md

docs/docs/key-principles.md

docs/docs/production-domain-model-methods.md

docs/docs/production-domain-model-processops-entities.md

docs/docs/production-domain-model-prodops-entities.md

docs/docs/production-domain-model-products.md

docs/docs/properties.md

docs/docs/sources.md

docs/docs/timeseries.md

docs/mkdocs.yml