Use database to store Query tempaltes

[hrishikeshrt]

Current handling of query templates through query.json might appear quite messy and not quite in tune with relational data storage. Ideally, this should have database storage and a GUI in Admin tab for easy modification.

This might require a significant amount of changes.
Currently, the following seem necessary to implement this. (Dropping use of JSON might make it much harder. Use of JSON would require special handling on UI end)

• Database model: Language (id, name)
• Database model: QueryGroup (id, group_names - JSON {lang_id: group_name_text})
• Database model: Query(id, query_group_id, cypher_template, query_texts - JSON {lang_id: query_text}, input_variables JSON {id: type}, output_order: JSON List?)
• GUI to define languages
• GUI to add query group names
  • Prompt to provide group names (for all languages)
• GUI to add query details
  • Identify number of variables in Cypher query (or at least allow to manually enter to start with)
  • Prompt those many for input variables
  • Prompt to provide query text (for all languages)
  • Prompt to provide output order