Add initial feature bsae

This contains the the following configurations.

Content type: Knowledge Base Article

Field bases:
- field_knowledge_base_categories
- field_knowledge_image
- field_knowledge_base_body

Field instances:
- node-knowledge_base_article-field_knowledge_base_categories
- node-knowledge_base_article-field_knowledge_image
- node-knowledge_base_article-field_knowledge_base_body

Taxonomy: knowledge_base_categories