feat(export): add buffer download methods to ExportBuilder

- Added download() method to get statements as Buffer without saving to disk
- Added downloadAsArrayBuffer() method for web API compatibility
- Enhanced documentation for getAccountStatement() method
- Updated README with comprehensive examples
- No breaking changes, backward compatible

pnpm-lock.yaml

@@ -20,6 +20,9 @@ importers:
       '@push.rocks/smartpromise':
         specifier: ^4.2.3
         version: 4.2.3
+      '@push.rocks/smartrequest':
+        specifier: ^4.2.1
+        version: 4.2.1
       '@push.rocks/smarttime':
         specifier: ^4.0.54
         version: 4.1.1
@@ -902,6 +905,9 @@ packages:
   '@push.rocks/smartrequest@2.1.0':
     resolution: {integrity: sha512-3eHLTRInHA+u+W98TqJwgTES7rRimBAsJC4JxVNQC3UUezmblAhM5/TIQsEBQTsbjAY8SeQKy6NHzW6iTiaD8w==}
 
+  '@push.rocks/smartrequest@4.2.1':
+    resolution: {integrity: sha512-33sxhXMOwDx2tv98LlyxDxI/UTjw16BOSWbnqrdUdNby/sSP3ahW3NF4JMOU5xKNQUz7TjLgREj9dPuumEgQ/g==}
+
   '@push.rocks/smartrouter@1.3.3':
     resolution: {integrity: sha512-1+xZEnWlhzqLWAaJ1zFNhQ0zgbfCWQl1DBT72LygLxTs+P0K8AwJKgqo/IX6CT55kGCFnPAZIYSbVJlGsgrB0w==}
 
@@ -6043,6 +6049,15 @@ snapshots:
       agentkeepalive: 4.6.0
       form-data: 4.0.4
 
+  '@push.rocks/smartrequest@4.2.1':
+    dependencies:
+      '@push.rocks/smartenv': 5.0.13
+      '@push.rocks/smartpath': 6.0.0
+      '@push.rocks/smartpromise': 4.2.3
+      '@push.rocks/smarturl': 3.1.0
+      agentkeepalive: 4.6.0
+      form-data: 4.0.4
+
   '@push.rocks/smartrouter@1.3.3':
     dependencies:
       '@push.rocks/lik': 6.2.2