fix: set default work_dir is "./kubekey".

[redscholar]

What type of PR is this?

/kind feature

What this PR does / why we need it:

there is four dir in work_dir. should package it by default.

workdir/
|-- projects/
|   |-- ansible-project1/
|   |   |-- playbooks/
|   |   |-- roles/
|   |   |   |-- roleName/
|   |   |   |   |-- tasks/
|   |   |   |   |   |-- main.yml
|   |   |   |   |-- defaults/
|   |   |   |   |   |-- main.yml
|   |   |   |   |-- templates/
|   |   |   |   |-- files/
|   |
|   |-- ansible-project2/
|   |-- ...
|
|-- runtime/
|-- group/version/
|   |   |-- pipelines/
|   |   |   |-- namespace/
|   |   |   |   |-- pipeline.yaml
|   |   |   |   |-- /pipelineName/variable/
|   |   |   |   |   |-- location.json
|   |   |   |   |   |-- hostname.json
|   |   |-- tasks/
|   |   |   |-- namespace/
|   |   |   |   |-- task.yaml
|   |   |-- configs/
|   |   |   |-- namespace/
|   |   |   |   |   |-- config.yaml
|   |   |-- inventories/
|   |   |   |-- namespace/
|   |   |   |   |-- inventory.yaml
|
|-- kubekey/
|
|-- kubernetes/

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

Does this PR introduced a user-facing change?

Additional documentation, usage docs, etc.:

[ks-ci-bot]

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[pixiake]

/lgtm

[ks-ci-bot]

LGTM label has been added.

Git tree hash: 9a3a182802580133b842df2496063aad0ca00cb6