feat(collectors) basic implementation of boring collectors; sender via http(s) to hard coded api route

internal/sender/sender.go

@@ -0,0 +1,12 @@
+package sender
+
+import (
+	"context"
+
+	"bugs.watch/agent/internal/aggregate"
+)
+
+// Sender sends snapshots somewhere.
+type Sender interface {
+	Send(ctx context.Context, snap aggregate.Snapshot) error
+}