assess nmdc-schema's interoperability with other environmental science semantic/linked-data resoruces

For NMDC goal 2.9

Start by doing a lexmatch with envthes and saving the results as something like https://github.com/microbiomedata/nmdc-schema/blob/main/sssom/nmdc-to-envthes.sssom.tsv

roughly

```shell
runoak -i sqlite:obo:mixs -a sqlite:obo:envthes lexmatch i^envthes: @ i^mixs:
```
