v0.0.5 (#110)

* fix: update OpenRouter API key validation to use /auth/key endpoint and httpx

* Refactor code structure for improved readability and maintainability

* feat: enhance welcome banner to include file commands indication

* feat: update LaTeX setup prompt to use selection UI for better user experience

* feat: update version to v0.0.5 in badges and project configuration

.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">v0.0.4</text>
+        font-size="13" font-weight="700" fill="#ffffff">v0.0.5</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">v0.0.4</text>
+        font-size="13" font-weight="700" fill="#ffffff">v0.0.5</text>
 </svg>