Switch UI to bubbletea (#1888)

* add bubbletea UI

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* swap pipeline to go 1.20.x and add attest guard for cosign binary

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* update note in developing.md about the required golang version

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix merge conflict for windows path handling

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* temp test for attest handler

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* add addtional test iterations for background reader

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

internal/bus/bus.go

@@ -16,20 +16,20 @@ package bus
 import "github.com/wagoodman/go-partybus"
 
 var publisher partybus.Publisher
-var active bool
 
-// SetPublisher sets the singleton event bus publisher. This is optional; if no bus is provided, the library will
+// Set sets the singleton event bus publisher. This is optional; if no bus is provided, the library will
 // behave no differently than if a bus had been provided.
-func SetPublisher(p partybus.Publisher) {
+func Set(p partybus.Publisher) {
 	publisher = p
-	if p != nil {
-		active = true
-	}
+}
+
+func Get() partybus.Publisher {
+	return publisher
 }
 
 // Publish an event onto the bus. If there is no bus set by the calling application, this does nothing.
-func Publish(event partybus.Event) {
-	if active {
-		publisher.Publish(event)
+func Publish(e partybus.Event) {
+	if publisher != nil {
+		publisher.Publish(e)
 	}
 }