gokrazy: use monorepo for gokrazy appliance builds (monogok)

This switches our gokrazy builds to use a new variant of cmd/gok called
opinionated about using monorepos: https://github.com/bradfitz/monogok

And with that, we can get rid of all the go.mod files and builddir forests
under gokrazy/**.

Updates #13038
Updates gokrazy/gokrazy#361

Change-Id: I9f18fbe59b8792286abc1e563d686ea9472c622d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/ssm v1.44.7
 	github.com/axiomhq/hyperloglog v0.0.0-20240319100328-84253e514e02
 	github.com/bradfitz/go-tool-cache v0.0.0-20251113223507-0124e698e0bd
+	github.com/bradfitz/monogok v0.0.0-20260208031948-2219c393d032
 	github.com/bramvdbogaerde/go-scp v1.4.0
 	github.com/cilium/ebpf v0.16.0
 	github.com/coder/websocket v1.8.12
@@ -43,6 +44,9 @@ require (
 	github.com/go-ole/go-ole v1.3.0
 	github.com/go4org/plan9netshell v0.0.0-20250324183649-788daa080737
 	github.com/godbus/dbus/v5 v5.1.1-0.20230522191255-76236955d466
+	github.com/gokrazy/breakglass v0.0.0-20251229072214-9dbc0478d486
+	github.com/gokrazy/gokrazy v0.0.0-20260123094004-294c93fa173c
+	github.com/gokrazy/serial-busybox v0.0.0-20250119153030-ac58ba7574e7
 	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8
 	github.com/golang/snappy v0.0.4
 	github.com/golangci/golangci-lint v1.57.1
@@ -87,6 +91,7 @@ require (
 	github.com/tailscale/certstore v0.1.1-0.20231202035212-d3fa0460f47e
 	github.com/tailscale/depaware v0.0.0-20251001183927-9c2ad255ef3f
 	github.com/tailscale/goexpect v0.0.0-20210902213824-6e8c725cea41
+	github.com/tailscale/gokrazy-kernel v0.0.0-20240728225134-3d23beabda2e
 	github.com/tailscale/golang-x-crypto v0.0.0-20250404221719-a5573b049869
 	github.com/tailscale/hujson v0.0.0-20221223112325-20486734a56a
 	github.com/tailscale/mkctr v0.0.0-20260107121656-ea857e3e500b
@@ -148,6 +153,7 @@ require (
 	github.com/alexkohler/nakedret/v2 v2.0.4 // indirect
 	github.com/armon/go-metrics v0.4.1 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
+	github.com/beevik/ntp v0.3.0 // indirect
 	github.com/blang/semver/v4 v4.0.0 // indirect
 	github.com/boltdb/bolt v1.3.1 // indirect
 	github.com/bombsimon/wsl/v4 v4.2.1 // indirect
@@ -177,11 +183,15 @@ require (
 	github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1 // indirect
 	github.com/gobuffalo/flect v1.0.3 // indirect
 	github.com/goccy/go-yaml v1.12.0 // indirect
+	github.com/gokrazy/gokapi v0.0.0-20250222071133-506fdb322775 // indirect
+	github.com/gokrazy/internal v0.0.0-20251208203110-3c1aa9087c82 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/golangci/plugin-module-register v0.1.1 // indirect
 	github.com/google/gnostic-models v0.7.0 // indirect
 	github.com/google/go-github/v66 v66.0.0 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/google/renameio/v2 v2.0.0 // indirect
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
 	github.com/gorilla/securecookie v1.1.2 // indirect
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // indirect
 	github.com/gosuri/uitable v0.0.4 // indirect
@@ -194,13 +204,18 @@ require (
 	github.com/hashicorp/golang-lru v0.6.0 // indirect
 	github.com/jjti/go-spancheck v0.5.3 // indirect
 	github.com/jmoiron/sqlx v1.4.0 // indirect
+	github.com/josharian/native v1.1.0 // indirect
 	github.com/karamaru-alpha/copyloopvar v1.0.8 // indirect
+	github.com/kenshaw/evdev v0.1.0 // indirect
+	github.com/kr/pty v1.1.8 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect
 	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
 	github.com/lib/pq v1.10.9 // indirect
 	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
 	github.com/macabu/inamedparam v0.1.3 // indirect
+	github.com/mdlayher/packet v1.1.2 // indirect
+	github.com/mdlayher/watchdog v0.0.0-20221003142519-49be0df7b3b5 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
 	github.com/moby/buildkit v0.20.2 // indirect
 	github.com/moby/docker-image-spec v1.3.1 // indirect
@@ -212,11 +227,13 @@ require (
 	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
 	github.com/puzpuzpuz/xsync v1.5.2 // indirect
+	github.com/rtr7/dhcp4 v0.0.0-20220302171438-18c84d089b46 // indirect
 	github.com/rubenv/sql-migrate v1.8.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/santhosh-tekuri/jsonschema/v5 v5.3.1 // indirect
 	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 // indirect
 	github.com/stacklok/frizbee v0.1.7 // indirect
+	github.com/vishvananda/netlink v1.3.1-0.20240922070040-084abd93d350 // indirect
 	github.com/xen0n/gosmopolitan v1.2.2 // indirect
 	github.com/xlab/treeprint v1.2.0 // indirect
 	github.com/ykadowak/zerologlint v0.1.5 // indirect
@@ -231,6 +248,7 @@ require (
 	go.uber.org/automaxprocs v1.5.3 // indirect
 	go.yaml.in/yaml/v2 v2.4.2 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	golang.org/x/crypto/x509roots/fallback v0.0.0-20260113154411-7d0074ccc6f1 // indirect
 	golang.org/x/telemetry v0.0.0-20251111182119-bc8e575c7b54 // indirect
 	golang.org/x/tools/go/packages/packagestest v0.1.1-deprecated // indirect
 	golang.org/x/xerrors v0.0.0-20240716161551-93cc26a95ae9 // indirect
@@ -431,7 +449,7 @@ require (
 	github.com/sourcegraph/go-diff v0.7.0 // indirect
 	github.com/spf13/afero v1.11.0 // indirect
 	github.com/spf13/cast v1.7.0 // indirect
-	github.com/spf13/cobra v1.10.1 // indirect
+	github.com/spf13/cobra v1.10.2 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.9 // indirect
 	github.com/spf13/viper v1.16.0 // indirect