…links (#28612)

Moves documentation CTAs that were previously rendered as header buttons
into inline `View docs` external text links under the relevant header or
section copy.

Deployment settings:
- `/deployment/overview`
- `/deployment/appearance`
- `/deployment/external-auth`
- `/deployment/oauth2-provider/apps`
- `/deployment/network`
- `/deployment/workspace-proxies`
- `/deployment/idp-org-sync`
- `/deployment/notifications`
- `/deployment/userauth`
- `/deployment/security`
- `/deployment/observability`
- `/deployment/premium`
- `/deployment/ai-governance`

Organization and user settings:
- `/organizations/:organization/groups`
- `/organizations/:organization/roles`
- `/organizations/:organization/idp-sync`
- `/organizations/new`
- `/organizations/:organization/provisioners`
- `/organizations/:organization/provisioner-keys`
- workspace sharing settings

Other admin/tool pages:
- `/ai/settings/gateway-keys`
- `/audit`
- `/connectionlog`
- template permissions settings

- `SettingsHeaderDocsLink` now renders the shared inline `Link`
component with the default label `View docs`, external icon, and
screen-reader text for new-tab behavior.
- Right-side header actions now remain reserved for real actions such as
`Add application`, `Create key`, or export buttons.
- `/deployment/security`: removed the duplicate Browser-Only Connections
badge and vertically aligned the remaining badge with the section
heading.
- `/deployment/observability`: kept docs links scoped to Audit Logging
and Monitoring, and removed the top-level observability docs link.
- Notification misconfiguration alerts now use the same `View docs`
text-link treatment.
- Storybook stories updated to assert the new link labels and hrefs
where covered.

- `pnpm check`
- `pnpm lint:types`
- Targeted Storybook interaction tests for the updated pages.

_This PR was generated by Coder Agents on behalf of @tracyjohnsonux._

(cherry picked from commit 046a532)