add Steering Committee definition to project governace

Signed-off-by: huabing zhao <zhaohuabing@gmail.com>

GOVERNANCE.md

@@ -30,6 +30,26 @@ The Aeraki Mesh and its leadership embrace the following values:
   participation, and there is a clear path up the contributor ladder into leadership
   positions.
 
+## Steering Committee
+
+The steering committee is a governing body that makes directional and strategic decisions for 
+the Aeraki Mesh project. It will also decide on any changes on its governance, marketing and 
+future direction. Seats will be tied to organizations and not individuals and will be valid for 
+1 year from the start date.
+
+- Aeraki Mesh core maintainer [Member: Huabing Zhao]
+- Baidu [Member: Tanjun Chen; End Date: 7/31/2024]
+
+Steering seats will be evaluated once per year and new people/organizations can be nominated
+for being added to the steering committee based on contribution to the project or being a
+valuable end user. During initial project bootstrap we will also explicitly reevaluate steering
+membership after each release; alpha; beta; GA. The existing steering committee will decide
+on any changes to the steering committee based on what is best for the project and community.
+
+Organizations can also be removed from the steering committee due to lack of project commitment
+on the same yearly basis. This will be determined by a majority vote of the existing committee.
+The exception to this is the Aeraki Mesh core maintainer seat which is a permanent seat.
+
 ## Maintainers
 
 Aeraki Mesh Maintainers have write access to the corresponding project GitHub repository.