Support code uploads without Git hoster

[schmijos]

This adds a parameter --from-local-dir. So you can call nctl like this:

nctl create app sample --from-local-dir

This then will pack the folder into a ZIP and upload it to gitonce (a service Nine would still have to provide).
Deploio can then check it out and deploy once.

Would look like this:

sequenceDiagram
      autonumber
      actor Coder
      participant Nctl as nctl CLI
      participant GitOnce as gitonce
      participant Deploio as deplo.io (kpack)

      Coder->>Nctl: nctl create app DEMO_APP --from-local-dir=./
      Nctl->>GitOnce: /upload ZIP
      GitOnce-->>Nctl: {"commit": COMMIT, "url": REPO_URL }
      Nctl->>Nctl: nctl create app DEMO_APP --git-url=REPO_URL --git-revision=COMMIT
      Nctl->>Deploio: Nine API Call

      Deploio->>Deploio: Start build from Git source
      Deploio->>GitOnce: GET REPO_URL/info/refs?service=git-upload-pack
      GitOnce-->>Deploio: Advertise refs

      Deploio->>GitOnce: POST REPO_URL/git-upload-pack
      GitOnce-->>Deploio: Send repository pack
      GitOnce->>GitOnce: Expire one-time repo and delete ZIP

      Deploio->>Deploio: Build and deploy app
      Coder->>Nctl: nctl logs build demo-app-1
      Nctl->>Deploio: Nine API Call
      Deploio-->>Nctl: Successful build logs

    Note over Coder,Nctl: Later operations using same Git URL will fail, for example:
      Coder->>Nctl: nctl update app DEMO_APP --git-url=REPO_URL
      Nctl->>Deploio: Request redeploy with same Git URL
      Deploio->>Deploio: Try to fetch source again
      Deploio->>GitOnce: GET/POST Git fetch
      GitOnce-->>Deploio: 410 Gone
      Coder->>Nctl: nctl logs build demo-app-2
      Nctl->>Deploio: Nine API Call
      Deploio-->>Nctl: Failed build logs

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[schmijos]

That's for sure not the final idea.