feat: json output for plugins list

[mshanemc]

add --json for x plugins command.

side effect

• significantly extends UT timeout limit for windows (this should unblock some of the dependabot PRs)

forcedotcom/cli#267
@W-13472231@

QA: you can plugins:link this, but sometimes you'll end up in a broken state when uninstalling it and will need to re-install the CLI?

[WillieRuemmele]

QA Notes

---

✅ : now has a --json flag to print results as json

➜  plugin-plugins git:(sm/plugins-list-with-json) 
 ➜  sfdx plugins --json
 ›   Error: Nonexistent flag: --json
 ›   See more help with --help
➜  plugin-plugins git:(sm/plugins-list-with-json) 
 ➜  spl .
@salesforce/cli: linking plugin @oclif/plugin-plugins... ⣯ [3/5] Fetching packages...
warning "oclif > [email protected]" has unmet peer dependency "mem-fs@^1.2.0 || ^2.0.0".
warning "oclif > [email protected]" has unmet peer dependency "mem-fs-editor@^8.1.2 || ^9.0.0".
@salesforce/cli: linking plugin @oclif/plugin-plugins... done
➜  plugin-plugins git:(sm/plugins-list-with-json) 
 ➜  sfdx plugins --json
[
  {
    "name": "@salesforce/plugin-dev",
    "tag": "0.7.6",
    "type": "user"
  },
  {
    "name": "@salesforce/plugin-signups",
    "tag": "1.4.18",
    "type": "user"
  },
  {
    "name": "@salesforce/plugin-packaging",
    "tag": "1.17.0",
    "type": "user"
  },
  {
    "type": "link",
    "name": "@oclif/plugin-update",
    "root": "/Users/william.ruemmele/projects/oclif/plugin-update"
  },
  {
    "type": "link",
    "name": "@salesforce/plugin-deploy-retrieve",
    "root": "/Users/william.ruemmele/projects/oss/plugin-deploy-retrieve"
  },
  {
    "type": "link",
    "name": "@oclif/plugin-plugins",
    "root": "/Users/william.ruemmele/projects/oclif/plugin-plugins"
  }
]

✅ : no plugins - couldn't run it from sfdx because it's linked to get the --json flag 🤪

 ➜  ./bin/dev plugins --json
[]