🔨 Move cli folder contents into project root (#1253)

* Remove `logger` module

* Remove `shared` module

* Move `cli` folder contents into project root

* Fix linter

* Change the module name from `github.com/kubeshark/kubeshark/cli` to `github.com/kubeshark/kubeshark`

* Set the default `Makefile` rule to `build`

* Add `lint` rule

* Fix the linter errors

kubernetes/errors.go

@@ -0,0 +1,26 @@
+package kubernetes
+
+type K8sTapManagerErrorReason string
+
+const (
+	TapManagerTapperUpdateError K8sTapManagerErrorReason = "TAPPER_UPDATE_ERROR"
+	TapManagerPodWatchError     K8sTapManagerErrorReason = "POD_WATCH_ERROR"
+	TapManagerPodListError      K8sTapManagerErrorReason = "POD_LIST_ERROR"
+)
+
+type K8sTapManagerError struct {
+	OriginalError    error
+	TapManagerReason K8sTapManagerErrorReason
+}
+
+// K8sTapManagerError implements the Error interface.
+func (e *K8sTapManagerError) Error() string {
+	return e.OriginalError.Error()
+}
+
+type ClusterBehindProxyError struct{}
+
+// ClusterBehindProxyError implements the Error interface.
+func (e *ClusterBehindProxyError) Error() string {
+	return "Cluster is behind proxy"
+}