cleanup(webhooks): remove team org management support

[romitg2]

What this does

• removes team and org scoped webhook creation from the settings webhook UI
• removes team/org webhook groups from viewer.webhook.getByViewer
• removes team-scoped webhook CRUD input fields and duplicate-url checks from the viewer webhook management flow
• limits personal webhook listing to user-owned webhooks on the management path
• removes team webhook template variables from the webhook form

Validation

yarn vitest run packages/features/webhooks/lib/service/WebhookService.test.ts
yarn type-check:ci --force

Result

• both commands passed locally
• diff size: 15 files changed, 134 insertions(+), 388 deletions(-)

[github-actions]

Hey there and thank you for opening this pull request! 👋🏼

We require pull request titles to follow the Conventional Commits specification and it looks like your proposed title needs to be adjusted.

Details:

Unknown release type "cleanup" found in pull request title "cleanup(webhooks): remove team org management support". 

Available types:
 - feat: A new feature
 - fix: A bug fix
 - docs: Documentation only changes
 - style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
 - refactor: A code change that neither fixes a bug nor adds a feature
 - perf: A code change that improves performance
 - test: Adding missing tests or correcting existing tests
 - build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
 - ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
 - chore: Other changes that don't modify src or test files
 - revert: Reverts a previous commit

[github-actions]

This PR has been marked as stale due to inactivity. If you're still working on it or need any help, please let us know or update the PR to keep it active.