add dart sdk docs links

Author: jyecusch

docs/reference/dart/api/api-all.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register a single handler fo
 
 # Dart - api.all()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register a single handler for all HTTP Methods (GET, POST, PUT, DELETE, PATCH) on a route.
 
 <Note>

docs/reference/dart/api/api-delete.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register an API route and se
 
 # Dart - api.delete()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register an API route and set a specific HTTP DELETE handler on that route.
 
 <Note>

docs/reference/dart/api/api-get.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register an API route and se
 
 # Dart - api.get()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register an API route and set a specific HTTP GET handler on that route.
 
 <Note>

docs/reference/dart/api/api-patch.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register an API route and se
 
 # Dart - api.patch()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register an API route and set a specific HTTP PATCH handler on that route.
 
 <Note>

docs/reference/dart/api/api-post.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register an API route and se
 
 # Dart - api.post()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register an API route and set a specific HTTP POST handler on that route.
 
 <Note>

docs/reference/dart/api/api-put.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register an API route and se
 
 # Dart - api.put()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register an API route and set a specific HTTP PUT handler on that route.
 
 <Note>

docs/reference/dart/api/api-route-all.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register a single handler fo
 
 # Dart - api.route.all()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register a single handler for all HTTP Methods (GET, POST, PUT, DELETE, PATCH) on the route.
 
 ```dart

docs/reference/dart/api/api-route-delete.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register a handler for HTTP
 
 # Dart - api.route.delete()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register a handler for HTTP DELETE requests to the route.
 
 ```dart

docs/reference/dart/api/api-route-get.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register a handler for HTTP
 
 # Dart - api.route.get()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register a handler for HTTP GET requests to the route.
 
 ```dart

docs/reference/dart/api/api-route-patch.mdx

@@ -4,6 +4,11 @@ description: "Reference for Nitric's Dart library - Register a handler for HTTP
 
 # Dart - api.route.patch()
 
+<Note>
+  This is reference documentation for the Nitric Dart SDK. To learn about APIs
+  in Nitric start with the [API docs](/api).
+</Note>
+
 Register a handler for HTTP PATCH requests to the route.
 
 ```dart