feat: correctly implement bitbucket & add OpenAIAdapter

internal/gitadapters/bitbucket/resource.go

@@ -0,0 +1,20 @@
+package bitbucket
+
+import (
+	"strings"
+
+	"git.schreifuchs.ch/schreifuchs/pierre-bot/internal/gitadapters/baseadapter"
+)
+
+type BitbucketAdapter struct {
+	baseadapter.Rest
+}
+
+func NewBitbucket(baseURL string, bearerToken string) *BitbucketAdapter {
+	baseURL, _ = strings.CutSuffix(baseURL, "/")
+	baseURL += "/rest/api/1.0"
+
+	return &BitbucketAdapter{
+		Rest: baseadapter.NewRest(baseURL, bearerToken),
+	}
+}