Enable pd.options.display.html.table_schema = True By Default
#### Problem description

**This is an enhancement request**

In order to enable a pandas to provide a JSON schema representation of the dataframe utilizing ```application/vnd.dataresource+json```, ```pd.options.display.html.table_schema``` must be set to ```True```.

I'm just wondering if this could be set to True by default? That way front-ends that support it, can ingest it without having to enable it from the import. Not sure on the implications, but wanted to start the convo...


#### Code Sample

```
import pandas as pd
pd.options.display.html.table_schema = True

```
