[kusion compile] project.yaml is not required

[howieyuen]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. cd appops/guestbook-frontend of konfig, delete project.yaml
2. cd prod stack, execute kusion compile

2. What did you expect to see? (Required)

error: project is not provided

3. What did you see instead (Required)

nothing printed, compile success

4. What is your KusionStack components version? (Required)

releaseVersion: v0.6.1
gitInfo:
    latestTag: v0.6.1
    commit: c5eea56957d986ce8914187868dd6901ef0cfd26
    treeState: clean
buildInfo:
    goVersion: go1.17.13
    GOOS: linux
    GOARCH: amd64
    numCPU: 2
    compiler: gc
    buildTime: "2022-09-05 02:45:23"
dependency:
    kclvmgoVersion: v0.4.3-alpha.3
    kclPluginVersion: v0.4.1-alpha2