test: verify cache miss after source file change in pack monorepo

Author: fengmk2

packages/cli/snap-tests/command-pack-monorepo/snap.txt

@@ -6,6 +6,10 @@ index.cjs
 ~/packages/hello$ vp pack ◉ cache hit, replaying
 vp run: cache hit, <variable>ms saved.
 
+> echo 'export function hello() { console.log("changed"); }' > packages/hello/src/hello.ts
+> vp run hello#build 2>&1 | grep 'cache miss' # should miss cache after source change
+~/packages/hello$ vp pack ○ cache miss: 'packages/hello/src/hello.ts' modified, executing
+
 > vp run array-config#build # should build the library supports array config
 > ls packages/array-config/dist # should have the library
 index.d.mts

packages/cli/snap-tests/command-pack-monorepo/steps.json

@@ -7,6 +7,8 @@
     },
     "ls packages/hello/dist # should have the library",
     "vp run hello#build 2>&1 | grep 'cache hit' # should hit cache",
+    "echo 'export function hello() { console.log(\"changed\"); }' > packages/hello/src/hello.ts",
+    "vp run hello#build 2>&1 | grep 'cache miss' # should miss cache after source change",
     {
       "command": "vp run array-config#build # should build the library supports array config",
       "ignoreOutput": true