Output app.yaml in model source

[xiwenc]

fixes #76

content:
    - name: Metadata.yaml
      type: file
      path: Metadata.yaml
    - name: Module2
      type: directory
      path: Module2
      content:
        - name: DomainModels$DomainModel.yaml
          type: file
          path: Module2/DomainModels$DomainModel.yaml
        - name: Folder_
          type: directory
          path: Module2/Folder_
          content:
            - name: Constant.Constants$Constant.yaml
              type: file
              path: Module2/Folder_/Constant.Constants$Constant.yaml
        - name: Folder_test3
          type: directory
          path: Module2/Folder_test3
          content:
            - name: Constant_4.Constants$Constant.yaml
              type: file
              path: Module2/Folder_test3/Constant_4.Constants$Constant.yaml

[github-actions]

Merging this branch will decrease overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/mxlint/mxlint-cli/mpr	76.80% (-1.12%)	👎

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/mxlint/mxlint-cli/mpr/mpr.go	80.28% (-3.00%)	355 (+56)	285 (+36)	70 (+20)	👎

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/mxlint/mxlint-cli/mpr/microflow_test.go
• github.com/mxlint/mxlint-cli/mpr/mpr_test.go
• github.com/mxlint/mxlint-cli/mpr/mpr_v1_test.go
• github.com/mxlint/mxlint-cli/mpr/mpr_v2_test.go