feat: text to image impl (#6437)

fix CLOUD-18
fix CLOUD-28
fix CLOUD-29

.github/helm/affine/charts/graphql/templates/copilot-secret.yaml

@@ -6,4 +6,5 @@ metadata:
 type: Opaque
 data:
   openaiSecret: {{ .Values.app.copilot.openai.key | b64enc }}
+  falSecret: {{ .Values.app.copilot.fal.key | b64enc }}
 {{- end }}

.github/helm/affine/charts/graphql/templates/deployment.yaml

@@ -154,6 +154,11 @@ spec:
               secretKeyRef:
                 name: "{{ .Values.app.copilot.secretName }}"
                 key: openaiSecret
+          - name: COPILOT_FAL_API_KEY
+            valueFrom:
+              secretKeyRef:
+                name: "{{ .Values.app.copilot.secretName }}"
+                key: falSecret
           {{ end }}
           {{ if .Values.app.oauth.google.enabled }}
           - name: OAUTH_GOOGLE_ENABLED