Add GET /vectors/list endpoint

https://docs.pinecone.io/reference/api/data-plane/list

README.md

@@ -118,6 +118,18 @@ index.fetch(
 )
 ```
 
+List vector IDs from an index (only for serverless indexes)
+```ruby
+pinecone = Pinecone::Client.new
+index = pinecone.index("example-index")
+index.list(
+  namespace: "example-namespace",
+  prefix: "example-prefix",
+  limit: 50,
+  pagination_token: "example-token"
+)
+```
+
 Updating a vector in an index
 ```ruby
 pinecone = Pinecone::Client.new
@@ -255,6 +267,7 @@ Contributions welcome!
 - Clone the repo locally
 - `bundle` to install gems
 - run tests with `rspec`
+- run linter with `standardrb`
 - `mv .env.copy .env` and add Pinecone API Key if developing a new endpoint or modifying existing ones
   - to disable VCR and hit real endpoints, `NO_VCR=true rspec`
 - To setup cloud indexes when writing new tests `ruby spec/support/setup.rb start` and `stop` to delete them

lib/pinecone/vector.rb

@@ -37,6 +37,17 @@ def fetch(namespace: "", ids: [])
       self.class.get("#{@base_uri}/vectors/fetch?#{query_string}", options)
     end
 
+    def list(namespace: "", prefix: "", limit: nil, pagination_token: "")
+      query_params = {}
+      query_params["namespace"] = namespace unless namespace.empty?
+      query_params["prefix"] = prefix unless prefix.empty?
+      query_params["limit"] = limit if limit
+      query_params["paginationToken"] = pagination_token unless pagination_token.empty?
+
+      query_string = URI.encode_www_form(query_params)
+      self.class.get("#{@base_uri}/vectors/list?#{query_string}", options)
+    end
+
     def upsert(body)
       payload = options.merge(body: body.to_json)
       self.class.post("#{@base_uri}/vectors/upsert", payload)