Feature Request: Swap the filename with the rulename in .eslint-rebase.json

I am a very rule-orientated person. I would like to use my IDE to inspect and collapse whole rules at a time, inside the .eslint-rebase.json. But currently it's not possible as it lists the filename as the first level, and rule name second.

If we could swap these, it would help with my organizational skills when rebasing eslint for an existing repo.

So instead of
```
{
"ignores": {
"apps/mgmt/components/FeatureFlags/FeatureFlags.tsx": {
"func-names": [
"render: function firstColRender(el) {",
```

We'd have
```
{
"ignores": {
"func-names": [
"apps/mgmt/components/FeatureFlags/FeatureFlags.tsx": {
"render: function firstColRender(el) {",
```