feat: Add classifier listing functionality

- Added a new function to list available classifiers.
- Extended the Jina client with `list_classifiers()` method.
- Added unit tests to verify the new functionality.

examples/clients/jina.vsh

@@ -55,3 +55,6 @@ classify_result := jina_client.classify(
 ) or { panic('Error while classifying: ${err}') }
 
 println('Classification result: ${classify_result}')
+
+classifiers := jina_client.list_classifiers() or { panic('Error fetching classifiers: ${err}') }
+println('Classifiers: ${classifiers}')

lib/clients/jina/classification_api.v

@@ -260,3 +260,32 @@ pub fn (mut j Jina) classify(params ClassifyParams) !ClassificationOutput {
 	result := json.decode(ClassificationOutput, response)!
 	return result
 }
+
+// Define the Classifier struct
+pub struct Classifier {
+pub mut:
+	classifier_id  string
+	model_name     string
+	labels         []string
+	access         string
+	updated_number int
+	used_number    int
+	created_at     string
+	updated_at     string
+	used_at        ?string
+	metadata       map[string]string
+}
+
+// Implement the list_classifiers function
+pub fn (mut j Jina) list_classifiers() ![]Classifier {
+	req := httpconnection.Request{
+		method: .get
+		prefix: 'v1/classifiers'
+	}
+
+	mut httpclient := j.httpclient()!
+	response := httpclient.get(req)!
+	println('response: ${response}')
+	classifiers := json.decode([]Classifier, response)!
+	return classifiers
+}

lib/clients/jina/jina_client_test.v

@@ -78,3 +78,10 @@ fn test_classify() {
 	assert classify_result.data[0].object == 'classification'
 	assert classify_result.data[1].object == 'classification'
 }
+
+fn test_get_classifiers() {
+	time.sleep(1 * time.second)
+	mut client := setup_client()!
+	classifiers := client.list_classifiers() or { panic('Error fetching classifiers: ${err}') }
+	assert classifiers.len != 0
+}