[DX] Create Repository - reduce friction on storage namespace config when running locally

[rmoff]

As a way of reducing the friction for new users running lakeFS locally it would be good to provide a default value for the storage namespace. Storage namespace is not something that a new user will necessarily be familiar with so we need to make it as easy to enter.

At the moment the form field has a placeholder but this disappears as soon as the user starts typing something which requires them to have memorized the syntax that the placeholder gave them

Some suggestions:

• If we're running locally then maybe we can simply default the actual contents of the field to local://example-bucket - does the user actually need to configure this unless they want to?
  • If not running locally then default the value to the storage namespace prefix?
• or maybe default the contents to the storage namespace prefix so all the user has to do is enter some path name?
• or add a hint underneath the form box

We should also delay the validation on what's entered until they at least take focus from the box - as can be seen from the screencap above the user gets a scary red message telling them they're doing something wrong even if they're entering as-yet-still-valid text

[johnnyaug]

@rmoff, a solution can be to add the default_storage_namespace (don't remember the exact name) configuration to the bundle of default local settings. This way, this field will get filled automatically

[rmoff]

:chefkiss: 🎉