release: v0.2.4 (#389)

* fix: add support for new Anthropic models and enhance adaptive thinking tests

* fix: implement patches for Anthropic protocol to handle foreign reasoning blocks and structured output for mandatory-thinking Kimi models

* fix: update version to v0.2.4 in badges, README, and project files

* fix: update Star History chart links in README and README.zh-CN

* fix: add support for Gemini 3.6 Flash and 3.5 Flash Lite models in model entries and update changelog

* fix: update wechat group image in assets

.github/assets/badge-pypi-dark.svg

@@ -5,5 +5,5 @@
   <rect x="54" y="5" width="62" height="24" rx="6" fill="#1565c0"/>
   <text x="85" y="22" text-anchor="middle"
         font-family="Inter, -apple-system, system-ui, sans-serif"
-        font-size="13" font-weight="700" fill="#ffffff">v0.2.3</text>
+        font-size="13" font-weight="700" fill="#ffffff">v0.2.4</text>
 </svg>

.github/assets/badge-pypi-light.svg

@@ -5,5 +5,5 @@
   <rect x="54" y="5" width="62" height="24" rx="6" fill="#2563eb"/>
   <text x="85" y="22" text-anchor="middle"
         font-family="Inter, -apple-system, system-ui, sans-serif"
-        font-size="13" font-weight="700" fill="#ffffff">v0.2.3</text>
+        font-size="13" font-weight="700" fill="#ffffff">v0.2.4</text>
 </svg>