feature: add go examples

Add test examples and instruction on how to upload test results to the Qase

Author: gibiw

examples/go/REAMDE.md

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+# How to upload test results to Qase from the Go tests
+
+You can upload test results to Qase from the Go tests. 
+
+First, you need to install the `gotestsum` package. This package is used to run the tests and save the results in the JUnit format. 
+
+Then you can upload the test results to Qase using the `qasectl` tool.
+
+Step-by-step guide:
+
+1. Clone the repository
+
+    ```bash
+    git clone https://github.com/qase-tms/qase-go.git
+    ```
+
+2. Move to the directory with the examples
+
+    ```bash
+    cd qase-go/examples/go
+    ```
+
+3. Install the required packages
+
+    ```bash
+    go mod tidy
+    ```
+
+4. Install the `gotestsum` package
+
+    ```bash
+    go install gotest.tools/gotestsum@latest
+    ```
+
+5. Run the tests and save the results to the `test-results.xml` file
+
+    ```bash
+    gotestsum --junitfile results/test-results.xml
+    ```
+
+6. Upload the test results to Qase using the [qasectl](https://github.com/qase-tms/qasectl/blob/main/docs/command.md) tool
+
+    ```bash 
+    qli testops result upload --project DEMO --token token --id 1 --format junit --path /results/test-results.xml --verbose
+    ```  

examples/go/go.mod

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+module examples/go
+
+go 1.22.5

examples/go/simple.go

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+package _go
+
+func Sum(a, b int) int {
+	return a + b
+}

examples/go/simple_test.go

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+package _go
+
+import "testing"
+
+func Test_SumSuccess(t *testing.T) {
+	result := Sum(1, 2)
+	if result != 3 {
+		t.Errorf("Sum(1, 2) = %d; want 3", result)
+	}
+}
+
+func Test_SumFailed(t *testing.T) {
+	result := Sum(1, 2)
+	if result != 4 {
+		t.Errorf("Sum(1, 2) = %d; want 4", result)
+	}
+}