Create schema version utils for comparing version numbers

[annakrystalli]

Similar to the is_v3_config() and associated functionality in v3-schema-utils.R,
create:

• version_gt
• version_gte
• version_lt
• version_lte

For determining the relationship of schema versions to a given version number.

Functions should have 2 arguments:

1. version: character string of version number to compare against
2. from: character string. Where should we get the version from? hub, file, config, schema_version)