feat: expose all 94 API paths in AmazonAdsClient (v2.2.0)

Rewrote client.py to expose every generated API class through the
client property tree.  Key additions:

- L1 Core: SB themes/media/reports_v2/optimization/forecasts/targeting,
  SD reports/optimization/locations/brand_safety, DSP target_kpi,
  Accounts budgets/advertising/test
- L1 Cross-cutting: audiences_discovery, product_selector, locations,
  exports
- L2 Reference: AMC sub-module (administration/audiences/reporting),
  RetailAdService sub-module (campaigns/ad_groups/product_ads/targets),
  DataProvider sub-module, Unified API
- L3 Services: Reporting sub-module (reports_v3/stores_analytics/
  brand_metrics/mmm), Insights sub-module (audience/keyword),
  Common sub-module (stores/assets/history/attribution),
  MediaPlanning, AdsDataManager, BrandAssociations
- L4 Experimental: SponsoredTV sub-module (campaigns/ad_groups/ads/
  targeting/creatives), Moderation sub-module (pre/unified),
  persona_builder, partner_opportunities
- Changed experimental from method to property

All 94 paths verified against noterp-ai integration layer.

Made-with: Cursor

Author: vanling1111

amazon_ads_api/__init__.py

@@ -21,22 +21,21 @@
     campaigns = await client.sp.campaigns.list_campaigns()
 
     # L2: 显式命名空间
-    result = await client.reference.amc.run_query(...)
+    result = await client.reference.amc.queries.run_query(...)
 
     # L3: 服务层
-    report = await client.services.reporting.create_report(...)
+    report = await client.services.reporting.reports_v3.create_report(...)
 
-    # L4: 需确认风险
-    exp = client.experimental(acknowledge_risk=True)
-    await exp.sponsored_tv.create_campaign(...)
+    # L4: 实验性
+    await client.experimental.ad_library.list_ads(...)
 
 详细文档:
 - API_TIER.md - 分级规则详解
 - API_CLASSIFICATION.md - 335 个 API 分级列表
 - README.md - 快速开始指南
 """
 
-__version__ = "2.1.0"
+__version__ = "2.2.0"
 __author__ = "Amazon Ads SDK Team"
 
 # 主入口