community[patch]: Add missing annotations (#24890)

This PR adds annotations in comunity package.

Annotations are only strictly needed in subclasses of BaseModel for
pydantic 2 compatibility.

This PR adds some unnecessary annotations, but they're not bad to have
regardless for documentation pages.

libs/community/langchain_community/llms/solar.py

@@ -41,7 +41,7 @@ class SolarCommon(BaseModel):
     model_name: str = Field(default="solar-1-mini-chat", alias="model")
     """Model name. Available models listed here: https://console.upstage.ai/services/solar"""
     max_tokens: int = Field(default=1024)
-    temperature = 0.3
+    temperature: float = 0.3
 
     class Config:
         allow_population_by_field_name = True