Feat/assistant app (#2086)

Co-authored-by: chenhe <guchenhe@gmail.com>
Co-authored-by: Pascal M <11357019+perzeuss@users.noreply.github.com>

api/core/tools/provider/builtin/wikipedia/_assets/icon.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="25" viewBox="0 0 24 25" fill="none">
+  <path d="M22.3627 6.50009H18.3156H18.1783V6.63743V7.07751V7.21484H18.3156H18.5969C18.924 7.21484 19.2189 7.38272 19.386 7.66394C19.553 7.94516 19.5593 8.28448 19.4028 8.57169L14.9027 16.8317L12.8532 11.9459L14.7837 8.40336C15.1832 7.67026 15.95 7.21484 16.7849 7.21484H16.8761H17.0134V7.07751V6.63743V6.50009H16.8761H12.829H12.6917V6.63743V7.07751V7.21484H12.829H13.1102C13.4373 7.21484 13.7323 7.38272 13.8993 7.66394C14.0663 7.94516 14.0726 8.28448 13.9162 8.57169L12.5159 11.1419L11.268 8.16696C11.1776 7.95134 11.1999 7.71594 11.3294 7.52124C11.4589 7.32654 11.6673 7.21484 11.9011 7.21484H12.221H12.3583V7.07751V6.63743V6.50009H12.221H7.3808H7.24347V6.63743V7.07751V7.21484H7.3808H7.44737C8.40218 7.21484 9.25775 7.78379 9.62715 8.66426L11.471 13.0599L9.4161 16.8317L5.78141 8.16696C5.69095 7.95134 5.71334 7.71594 5.8428 7.52124C5.97227 7.32654 6.18065 7.21484 6.41449 7.21484H6.90603H7.04337V7.07751V6.63743V6.50009H6.90603H1.63734H1.5V6.63743V7.07751V7.21484H1.63734H1.96072C2.91554 7.21484 3.77116 7.78379 4.1405 8.66426L8.33049 18.6529C8.40379 18.8276 8.57372 18.9405 8.76347 18.9405C8.93762 18.9405 9.09139 18.849 9.17485 18.6958L9.72141 17.6928L11.8081 13.8635L13.8171 18.6528C13.8904 18.8275 14.0603 18.9404 14.2501 18.9404C14.4242 18.9404 14.578 18.849 14.6614 18.6958L15.208 17.6928L20.2703 8.40327C20.6698 7.67016 21.4366 7.21475 22.2715 7.21475H22.3627H22.5V7.07741V6.63734V6.5H22.3627V6.50009Z" fill="#222A30"/>
+</svg>

api/core/tools/provider/builtin/wikipedia/tools/wikipedia_search.py

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+from core.tools.tool.builtin_tool import BuiltinTool
+from core.tools.entities.tool_entities import ToolInvokeMessage
+
+from pydantic import BaseModel, Field
+
+from typing import Any, Dict, List, Union
+
+from langchain import WikipediaAPIWrapper
+from langchain.tools import WikipediaQueryRun
+
+class WikipediaInput(BaseModel):
+    query: str = Field(..., description="search query.")
+
+class WikiPediaSearchTool(BuiltinTool):
+    def _invoke(self, 
+                user_id: str, 
+               tool_paramters: Dict[str, Any], 
+        ) -> Union[ToolInvokeMessage, List[ToolInvokeMessage]]:
+        """
+            invoke tools
+        """
+        query = tool_paramters.get('query', '')
+        if not query:
+            return self.create_text_message('Please input query')
+        
+        tool = WikipediaQueryRun(
+            name="wikipedia",
+            api_wrapper=WikipediaAPIWrapper(doc_content_chars_max=4000),
+            args_schema=WikipediaInput
+        )
+
+        result = tool.run(tool_input={
+            'query': query
+        })
+
+        return self.create_text_message(self.summary(user_id=user_id,content=result))
+    

api/core/tools/provider/builtin/wikipedia/tools/wikipedia_search.yaml

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+identity:
+  name: wikipedia_search
+  author: Dify
+  label:
+    en_US: WikipediaSearch
+    zh_Hans: 维基百科搜索
+  icon: icon.svg
+description:
+  human:
+    en_US: A tool for performing a Wikipedia search and extracting snippets and webpages.
+    zh_Hans: 一个用于执行维基百科搜索并提取片段和网页的工具。
+  llm: A tool for performing a Wikipedia search and extracting snippets and webpages. Input should be a search query.
+parameters:
+  - name: query
+    type: string
+    required: true
+    label:
+      en_US: Query string
+      zh_Hans: 查询语句
+    human_description:
+      en_US: key words for searching
+      zh_Hans: 查询关键词
+    llm_description: key words for searching
+    form: llm

api/core/tools/provider/builtin/wikipedia/wikipedia.py

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+from core.tools.provider.builtin_tool_provider import BuiltinToolProviderController
+from core.tools.errors import ToolProviderCredentialValidationError
+
+from core.tools.provider.builtin.wikipedia.tools.wikipedia_search import WikiPediaSearchTool
+
+class WikiPediaProvider(BuiltinToolProviderController):
+    def _validate_credentials(self, credentials: dict) -> None:
+        try:
+            WikiPediaSearchTool().fork_tool_runtime(
+                meta={
+                    "credentials": credentials,
+                }
+            ).invoke(
+                user_id='',
+                tool_paramters={
+                    "query": "misaka mikoto",
+                },
+            )
+        except Exception as e:
+            raise ToolProviderCredentialValidationError(str(e))

api/core/tools/provider/builtin/wikipedia/wikipedia.yaml

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+identity:
+  author: Dify
+  name: wikipedia
+  label:
+    en_US: Wikipedia
+    zh_Hans: 维基百科
+  description:
+    en_US: Wikipedia is a free online encyclopedia, created and edited by volunteers around the world.
+    zh_Hans: 维基百科是一个由全世界的志愿者创建和编辑的免费在线百科全书。
+  icon: icon.svg
+credentails_for_provider: