Search within documents

**Given** a properly classified document uploaded into BCAP
**When** viewing the document as part of the Site Details Section 9
**Then** there exists a way to search for contents inside of the document

**Note**:
Assume that docs uploaded into the cloud storage are indexed and searchable as part of the cloud service offering

**AC**:

- [ ] Can search for contents within a single document
- [ ] Can search for contents within any documents user has permissions to view

Start at the document view in Site Details Section 9 and trace how classified documents are loaded from cloud storage. Check how the cloud service's indexing and permission filtering can support searches within one document and across all documents the user may view; done means both acceptance criteria work.

Written by the indexing model from the issue text.