Alternate column names

We have several apps built in different languages that use the same database. At some point in the last 15 years of this app running, some columns have been named wonky or misspelled. We can't just easily run a `RENAME COLUMN` migration because there's no telling where all this thing may be called.

What if we had a way to rename the method that calls a column?

```crystal
table do
column email : String, from: "employeemail"
end
```

This way I could also do `UserQuery.new.email("b@a.com")` which would still generate `SELECT * FROM users WHERE employeemail = 'b@a.com'`

Start at the `table do` declaration and trace how `UserQuery.new.email("b@a.com")` becomes SQL. The change is complete when an alternate method name can target the existing `employeemail` column while generated queries still use that database column.

Written by the indexing model from the issue text.