Migrate from urfave/cli to cobra (#426)

* wip

* env var fix

* cluster create

* cluster create and delete

* cluster list

* cluster cmd

* kubeconfig

* policy create

* policy delete and list, and added root commands

* removed urfavecli from k3kcli

* fix policy command

* k3k-kubelet to cobra

* updated docs

* updated go.mod

* updated test

* added deletion

* added cleanup and flake attempts

* wip bind env

* simplified config

go.mod

@@ -17,10 +17,10 @@ require (
 	github.com/onsi/gomega v1.36.0
 	github.com/rancher/dynamiclistener v1.27.5
 	github.com/sirupsen/logrus v1.9.3
+	github.com/spf13/viper v1.20.1
 	github.com/stretchr/testify v1.10.0
 	github.com/testcontainers/testcontainers-go v0.35.0
 	github.com/testcontainers/testcontainers-go/modules/k3s v0.35.0
-	github.com/urfave/cli/v2 v2.27.5
 	github.com/virtual-kubelet/virtual-kubelet v1.11.1-0.20250530103808-c9f64e872803
 	go.etcd.io/etcd/api/v3 v3.5.16
 	go.etcd.io/etcd/client/v3 v3.5.16
@@ -42,7 +42,15 @@ require (
 	sigs.k8s.io/controller-runtime v0.19.4
 )
 
-require github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+require (
+	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
+	github.com/sagikazarmark/locafero v0.7.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.12.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+)
 
 require (
 	dario.cat/mergo v1.0.1 // indirect
@@ -69,7 +77,7 @@ require (
 	github.com/coreos/go-semver v0.3.1 // indirect
 	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
 	github.com/cpuguy83/dockercfg v0.3.2 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.6 // indirect
 	github.com/cyphar/filepath-securejoin v0.3.6 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/distribution/reference v0.6.0 // indirect
@@ -86,7 +94,7 @@ require (
 	github.com/exponent-io/jsonpath v0.0.0-20210407135951-1de76d718b3f // indirect
 	github.com/fatih/color v1.13.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/fsnotify/fsnotify v1.8.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
 	github.com/go-errors/errors v1.4.2 // indirect
 	github.com/go-gorp/gorp/v3 v3.1.0 // indirect
@@ -166,9 +174,9 @@ require (
 	github.com/shirou/gopsutil/v3 v3.23.12 // indirect
 	github.com/shoenig/go-m1cpu v0.1.6 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
-	github.com/spf13/cast v1.7.0 // indirect
-	github.com/spf13/cobra v1.8.1 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	github.com/spf13/cobra v1.9.1
+	github.com/spf13/pflag v1.0.6
 	github.com/stoewer/go-strcase v1.3.0 // indirect
 	github.com/tklauser/go-sysconf v0.3.12 // indirect
 	github.com/tklauser/numcpus v0.6.1 // indirect
@@ -177,13 +185,12 @@ require (
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
 	github.com/xlab/treeprint v1.2.0 // indirect
-	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
 	github.com/yusufpapurcu/wmi v1.2.3 // indirect
 	go.etcd.io/etcd/client/pkg/v3 v3.5.16 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.53.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.54.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0 // indirect
 	go.opentelemetry.io/otel v1.33.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0 // indirect
@@ -203,9 +210,9 @@ require (
 	golang.org/x/time v0.9.0 // indirect
 	golang.org/x/tools v0.26.0 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.4.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240826202546-f6391c0de4c7 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240826202546-f6391c0de4c7 // indirect
-	google.golang.org/grpc v1.65.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20241209162323-e6fa225c2576 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241223144023-3abc09e42ca8 // indirect
+	google.golang.org/grpc v1.67.3 // indirect
 	google.golang.org/protobuf v1.36.6 // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect