Added validate command and the required script & util methods

[aishwarya-tw]

Added validate command and the required script & util methods

Contributing to Twilio

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• [x] I acknowledge that all my contributions will be made under the project's license.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 91.36179% with 85 lines in your changes missing coverage. Please review.

Project coverage is 89.68%. Comparing base (c557bb4) to head (779c178). Report is 2 commits behind head on main.

Files	Patch %	Lines
...ges/flex-plugin-webpack/src/webpack/webpack.dev.ts	3.33%	29 Missing :warning:
...ckages/flex-plugin-scripts/src/scripts/validate.ts	94.44%	7 Missing and 2 partials :warning:
packages/flex-dev-utils/src/telemetry/lib/track.ts	0.00%	8 Missing :warning:
...ckages/plugin-flex/src/sub-commands/flex-plugin.ts	90.00%	7 Missing :warning:
...ages/flex-dev-utils/src/telemetry/lib/telemetry.ts	95.77%	6 Missing :warning:
...es/plugin-flex/src/commands/flex/plugins/deploy.ts	95.04%	6 Missing :warning:
.../flex-plugin-webpack/src/devServer/pluginServer.ts	37.50%	5 Missing :warning:
...x-plugin-webpack/src/devServer/webpackDevServer.ts	0.00%	4 Missing :warning:
packages/flex-dev-utils/src/http/lib/http.ts	78.57%	2 Missing and 1 partial :warning:
packages/flex-dev-utils/src/updateNotifier.ts	86.96%	3 Missing :warning:
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #919      +/-   ##
==========================================
+ Coverage   89.30%   89.68%   +0.38%     
==========================================
  Files         140      146       +6     
  Lines       13537    14423     +886     
  Branches      935      972      +37     
==========================================
+ Hits        12088    12934     +846     
- Misses       1435     1470      +35     
- Partials       14       19       +5     

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.