add copyfiles dev dependency

Author: retrofox

packages/site-admin/package.json

@@ -47,6 +47,7 @@
 	"devDependencies": {
 		"@automattic/calypso-build": "workspace:^",
 		"@automattic/calypso-typescript-config": "workspace:^",
+		"copyfiles": "^2.4.1",
 		"postcss": "^8.4.5",
 		"typescript": "^5.3.3",
 		"webpack": "^5.97.1"

yarn.lock

@@ -1839,6 +1839,7 @@ __metadata:
   dependencies:
     "@automattic/calypso-build": "workspace:^"
     "@automattic/calypso-typescript-config": "workspace:^"
+    copyfiles: "npm:^2.4.1"
     postcss: "npm:^8.4.5"
     typescript: "npm:^5.3.3"
     webpack: "npm:^5.97.1"
@@ -15405,6 +15406,24 @@ __metadata:
   languageName: node
   linkType: hard
 
+"copyfiles@npm:^2.4.1":
+  version: 2.4.1
+  resolution: "copyfiles@npm:2.4.1"
+  dependencies:
+    glob: "npm:^7.0.5"
+    minimatch: "npm:^3.0.3"
+    mkdirp: "npm:^1.0.4"
+    noms: "npm:0.0.0"
+    through2: "npm:^2.0.1"
+    untildify: "npm:^4.0.0"
+    yargs: "npm:^16.1.0"
+  bin:
+    copyfiles: copyfiles
+    copyup: copyfiles
+  checksum: e65cd055ec9acc14997b0ace83973d73f8d9c68167cbf4293c40b52d100af09a8c8da329042d52dc33422c0a8cbf74c6efb25e9ae088667721653659bd67bf57
+  languageName: node
+  linkType: hard
+
 "core-js-bundle@npm:^3.6.4":
   version: 3.16.2
   resolution: "core-js-bundle@npm:3.16.2"
@@ -36657,7 +36676,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"yargs@npm:^16.0.0, yargs@npm:^16.1.1, yargs@npm:^16.2.0":
+"yargs@npm:^16.0.0, yargs@npm:^16.1.0, yargs@npm:^16.1.1, yargs@npm:^16.2.0":
   version: 16.2.0
   resolution: "yargs@npm:16.2.0"
   dependencies: