feat: Jira init non-interactive

[ankitpokhrel]

Fixes #366

We can now use available flags to skip the prompt while generating the config.

$ jira init --installation cloud --server https://demo.atlassian.net --login [email protected] --project KEY --board "My Board Name"

Available flags

$ jira init -h
Init initializes jira configuration required for the tool to work properly.

USAGE
  jira init [flags]

FLAGS
      --installation string   Is this a 'cloud' or 'local' jira installation?
      --server string         Link to your jira server
      --login string          Jira login username or email based on your setup
      --board string          Name of your default board in the project
      --force                 Forcefully override existing config if it exists
      --insecure              If set, the tool will skip TLS certificate verification.
                              This can be useful if your server is using self-signed certificates.
  -h, --help                  help for init

INHERITED FLAGS
  -c, --config string    Config file (default is ~/.config/.jira/.config.yml)
      --debug            Turn on debug output
  -p, --project string   Jira project to look into (defaults to ~/.config/.jira/.config.yml)