Design for basic table operations

[kgodey]

Problem

Users may want to:

• create a new empty table
• create a table from copy/pasting data
• create a table by uploading a file from a remote URL
• edit the name of a table
• delete a table

We should allow this through the UI

Proposed solution

We need a design for how users can accomplish these tasks, including error states if a table is unable to be edited or deleted, or if a user might need to perform additional actions before a table is deleted (such as removing references to it from other places).

Additional context

We'll know more about what error states a user might encounter after #184 and #186 are implemented.

[ghislaineguerin]

Spec posted here: https://wiki.mathesar.org/design/specs/table-operations