[BE] Harvest Ontologies Semantic Assets for Alignment ttl files and Expose it in NDC UI

[SrinivasanTarget]

Acceptance Criteria:
Harvest Ontologies

• Identify Location of Ontology ttl files [Process only the align ttl files -
• Extract alignment data from align ttl file and add it to above index
• Expose REST Endpoints for searching the Ontologies
• Search Endpoint exposes Ontologies in response.
• Search for Ontologies in Search Box of NDC home page and display results in both results page and details page
• Show Alignment details indexed in details page

Assumption - main ttl file should be processed before this]
Assumption: Semantic Asset Index is already created

[ioggstream]

To harvest a repository in development, run

curl http://localhost:8080/jobs/harvest/repositories?repo_urls=https%3A%2F%2Fgithub.com%2Fitalia%2Fdaf-ontologie-vocabolari-controllati -XPOST

[ioggstream]

@giorgialodi should we process "alignment" files? If not, I think we could close this file.

[giorgialodi]

@ioggstream alignments in specific cases are fundamental. However, currently, looking at all the rest that is necessary to do in schema, I would postpone any type of reasoning on these, in any case important, files.