PLT-7407: Back-end plugin mechanism (#7177)

* begin backend plugin wip

* flesh out rpcplugin. everything done except for minor supervisor stubs

* done with basic plugin infrastructure

* simplify tests

* remove unused test lines

1 files changed, 8 insertions, 0 deletions

diff --git a/plugin/supervisor.go b/plugin/supervisor.go
new file mode 100644
index 000000000..5ddf5f169
--- /dev/null
+++ b/plugin/supervisor.go
@@ -0,0 +1,8 @@
+package plugin
+
+// Supervisor provides the interface for an object that controls the execution of a plugin.
+type Supervisor interface {
+	Start() error
+	Stop() error
+	Hooks() Hooks
+}