Correct the name(s) of the schema files - they may not be consistent

[neomatrix369]

Problem to Solve

Names like schema.tql are too generic, call it friendship-schema.tql, or something more descriptive - maybe typedb-friendship-schema.tql! They will be downloading more such schemas in the future, from your site and elsewhere, let them not be lost in their download folder.

Current Workaround

None.

Proposed Solution

Make the names of the files consistent and also they should be available for download. Keep any other infrastructure trying to use these files separate so that when they are changed the docs are not affected. Its client-facing and should always work and be correct.