[PROPOSAL] lino constraint disable

# Problem

As a user of lino command, I want to disable foreign key constraints on a given table or ingress-descriptor, without re-enabling immediately. I want to be able to enable disabled contraints later.

# Solution

The new command `lino constraint` will handle listing/enabling/disabling of foreign key contraints.

**List constraints on foreign key pointing to **
```console
$ lino constraints list --table
{"table": "ACTION", "constraint_name": "FK_ACTION_01"}
```

**List constraints on foreign key pointing to any table in the ingress-descriptor**
```console
$ lino constraints list --i
{"table": "ACTION", "constraint_name": "FK_ACTION_01"}
```

- constraints are listed in the order they need to be enabled

**List and disable constraints on foreign key pointing to **
```console
$ lino constraints disable --table > constraints.jsonl
1 constraint disabled
```

**List and disable constraints on foreign key pointing to any table in the ingress-descriptor**
```console
$ lino constraints disable -i > constraints.jsonl
1 constraint disabled
```

**Enable constraints previously disabled**
```console
$ lino constraints enable < constraints.jsonl
1 constraint enabled
```