[GOV] Supporting Developer role (#2775)

* supporting dev role

* pr req

* Update governance.md

* typo

* Automatic `pre-commit` fixes

* aeon

---------

Co-authored-by: MatthewMiddlehurst <25731235+MatthewMiddlehurst@users.noreply.github.com>

Author: MatthewMiddlehurst

docs/governance.md

@@ -23,6 +23,15 @@ as detailed in the contributing guide. Contributors play a crucial role in shapi
 project through participating in discussions and influencing the decision-making
 process.
 
+### Supporting Developers
+
+Supporting developers are contributors who have been nominated by a core developer
+and granted write access to the `aeon` repository. No vote is required for this role,
+but the nominator must notify the Core Developers and create a Pull Request.
+Supporting developers can have their access revoked at any time by a core developer
+if it is determined that they are abusing this access. Access will also be removed
+after 6 months of inactivity.
+
 ### Core Developers
 
 Core developers are community members that have made significant contributions and are