Add vsce plugin and merge other plugins into repo

[t1m0thyj]

Sorry for the large diff 😢 It may be easier to review without the first commit that just imports code from other repos: d94b2ec...support-zowe-explorer

• Merge the zowe-actions/octorelease-lerna and zowe-actions/octorelease-script repos into this repository. It should be simpler for us to maintain them in a single Octorelease repo going forward 🙂

  • This means that zowe/zowe-cli will no longer need to include @octorelease/lerna as a dev dependency.
  • Also, zowe-actions/octorelease-script is now deprecated in favor of zowe-actions/octorelease/script in this repo.

• Add a new plugin for publishing VS Code extensions that can be used by zowe/vscode-extension-for-zowe. It supports the following options:

  Options	Description	Default
  ovsxPublish	Specify true to publish to the OVSX registry.	false
  vscePublish	Specify false to skip publishing to the VS Code marketplace.	true
  vsixDir	Path to directory where extension bundle (VSIX) should be generated, or false to skip creating a VSIX.	false

• Update changelog plugin to support displayNames option that defines display names for packages in a monorepo (e.g., "zowe-explorer-ftp-extension" -> "Zowe Explorer Extension for FTP").

• Update GitHub plugin to create new releases in draft status, and replace createRelease option with publishRelease to be used if the draft release should be published.

• Support running a plugin multiple times with overridden current working directory ($cwd) and environment variables ($env). For example, to publish 2 VS Code extensions:

  {
    "plugins": [
      ["@octorelease/vsce", {
        "$cwd": "packages/zowe-explorer",
        "vsixDir": "dist"
      }, {
        "$cwd": "packages/zowe-explorer-ftp-extension",
        "vsixDir": "dist"
      }]
    ]
  }

• Numerous other small enhancements, bug fixes, and dependency updates 🚀

[zFernand0]

For those reviewing, you can also look at the PR view (which offers all the PR review features) and exclude the first commit.
Here is a direct link: https://github.com/zowe-actions/octorelease/pull/81/files/d94b2ecf7428db3583f7eb5f14da16360003084e..a87163b96e620753ae6d5eca64ad67efa3d6a28a

[zFernand0]

Overall, LGTM! 😋
Left a few comments and questions.
I'll go back and resolve the comments once we chat 😉