This PR migrates `libs/components` to use strict TypeScript.
- Remove `@ts-strict-ignore` from each file in `libs/components` and resolved any new compilation errors
- Converted ViewChild and ContentChild decorators to use the new signal-based queries using the [Angular signal queries migration](https://angular.dev/reference/migrations/signal-queries)
- Made view/content children `required` where appropriate, eliminating the need for additional null checking. This helped simplify the strict migration.
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Co-authored-by: Vicki League <vleague@bitwarden.com>
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