DOC: update Ecosystem page, and define governance
#### Location of the documentation
 [Ecosystem](https://pandas.pydata.org/community/ecosystem.html)  (wepage), [ecosystem.rst](https://github.com/pandas-dev/pandas/blob/318bed9f7c16c3352178cbf68e8dddfaba32ed6d/doc/source/ecosystem.rst) (file)


#### Documentation problem
- There is some deprecated library:
[qgrid](https://github.com/quantopian/qgrid) is [one of them](https://github.com/quantopian/qgrid/issues/348).

- There is some cutting edge/popular library that are missing
  [Great expectation](https://github.com/great-expectations/great_expectations) is probably one of them. 
#### Suggested fix for documentation  

##### Deprecated library
- [ ] List deprecated libraries
- [ ]  Remove deprecated libraries (or put them in a deprecated section)
- [ ] Replace deprecated package for the best (or bests) available alternative
- [ ] [Governance] Define criteria for "what is a deprecated package" or a governance system  (e.g. is @TomAugspurger  Engarde library deprecated?)

##### library to include

- [ ] <details> <summary>List  potential library to include</summary>
[Great expectation](https://github.com/great-expectations/great_expectations) ,
[Pandas-profiling](https://pandas-profiling.github.io/pandas-profiling/docs/master/index.html),
[ipydatagrid](https://github.com/bloomberg/ipydatagrid),
[VS-Code](https://github.com/microsoft/vscode),
[missingno](https://github.com/ResidentMario/missingno)
[streamlit](https://streamlit.io/),
[dataprep](https://dataprep.ai/),
[mito](https://trymito.io/),
⚠️This list is clearly no exhaustive.⚠️
</details>

- [ ] Define which to include or not
- [ ] [Governance] Define how to define packages to include



I am willing to try to do the job if I am helped ;-)


Ps:
This issue is related to  https://github.com/pandas-dev/pandas/issues/24927 