rename: kafka → samsa

Full project rename from kafka to samsa (after Gregor Samsa, who
woke one morning from uneasy dreams to find himself transformed).

- Module: github.com/metamorphosis-dev/kafka → samsa
- Binary: cmd/kafka/ → cmd/samsa/
- CSS: kafka.css → samsa.css
- UI: all 'kafka' product names, titles, localStorage keys → samsa
- localStorage keys: kafka-theme → samsa-theme, kafka-engines → samsa-engines
- OpenSearch: ShortName, LongName, description, URLs updated
- AGPL headers: 'kafka' → 'samsa'
- Docs, configs, examples updated
- Cache key prefix: kafka: → samsa:

internal/views/views_test.go

@@ -3,7 +3,7 @@ package views
 import (
 	"testing"
 
-	"github.com/metamorphosis-dev/kafka/internal/contracts"
+	"github.com/metamorphosis-dev/samsa/internal/contracts"
 )
 
 func mockSearchResponse(query string, numResults int) contracts.SearchResponse {
@@ -36,10 +36,10 @@ func mockEmptyResponse() contracts.SearchResponse {
 }
 
 func TestFromResponse_Basic(t *testing.T) {
-	resp := mockSearchResponse("kafka trial", 42)
-	data := FromResponse(resp, "kafka trial", 1, "", "", "")
+	resp := mockSearchResponse("samsa trial", 42)
+	data := FromResponse(resp, "samsa trial", 1, "", "", "")
 
-	if data.Query != "kafka trial" {
+	if data.Query != "samsa trial" {
 		t.Errorf("expected query 'kafka trial', got %q", data.Query)
 	}
 	if data.NumberOfResults != 42 {