Add module rename script

reformat.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -e -o pipefail
+
+GO_FILES=$(find . -name "*.go" | grep -v .git)
+
+gofumpt -l -w $GO_FILES
+gofmt -l -w $GO_FILES
+gci write $GO_FILES

rename-module.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -e -o pipefail
+
+OLD_MODULE_NAME="github.com/tailscale/wireguard-go"
+NEW_MODULE_NAME="github.com/sagernet/wireguard-go"
+
+rules=$(cat <<EOF
+id: replace-module
+language: go
+rule:
+  kind: import_spec
+  pattern: \$OLD_IMPORT
+constraints:
+  OLD_IMPORT:
+    has:
+      field: path
+      regex: ^"$OLD_MODULE_NAME
+transform:
+  NEW_IMPORT:
+    replace:
+      source: \$OLD_IMPORT
+      replace: $OLD_MODULE_NAME(?<PATH>.*)
+      by: $NEW_MODULE_NAME\$PATH
+fix: \$NEW_IMPORT
+EOF
+)
+
+sg scan --inline-rules "$rules" -U
+
+sed -i "s|module $OLD_MODULE_NAME|module $NEW_MODULE_NAME|" go.mod
+
+go mod tidy
+
+./reformat.sh
+
+git commit -m "Rename module" -a