Write up research into host organisations for TAMS as an ADR

[samdbmg]

Context
As part of the ongoing process of moving to open governance (see GOVERNANCE.md) some research has been carried out into possible open source organisations for TAMS to become part of.

Actions

• Write up the output of this research, in the form of the ADR document that will eventually capture the decision.
• Open it up to discussion among the TSC, and the community.

Outcome
ADR