Improve free-text search

[jamesfisher-geo]

Description:

• Searches over the entire document rather than properties only
• Adds trailing wildcard characters to match incomplete words
• Datetime and numerical handling
• Partial case insensitive (unfortunately, full case-insensitive search is only available when searching a specific field)

PR Checklist:

• Code is formatted and linted (run pre-commit run --all-files)
• Tests pass (run make test)
• Documentation has been updated to reflect changes, if applicable
• Changes are added to the changelog