we move our PostgreSQL specific migrations to a subdirectory.
The SQLite migrations have been created by running `diesel` against a
copy, and then fixing what's broken.
In the end i reduced all modifications to a single create, since we
*are* starting out fresh with SQLite.
n.b.: i'm not entirely happy with the results yet, because diesel
heavily modifies our `plume-models/src/schema.rs`.
I'll keep fiddling until we have the same types between the two
databases.
follow review from @pwoolcoc, and do not use
SafeString::new(&<String>::new())
since this makes an allocation which will then just be thrown away.
Instead, we pass ""
long_description & short_description's documentation say they can be
Markdown, but they are String, not SafeString.
This led to escaped strings being printed in the editor
https://github.com/Plume-org/Plume/issues/220
Igor Galić