chore(demos): strict templates, import warnings, update dock manager demo · IgniteUI/igniteui-angular@2dac410

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

'e' is defined but never used. Allowed unused args must match /^_/u

'event' is defined but never used. Allowed unused args must match /^_/u

'event' is defined but never used. Allowed unused args must match /^_/u

'e' is defined but never used. Allowed unused args must match /^_/u

'e' is defined but never used. Allowed unused args must match /^_/u

'event' is defined but never used. Allowed unused args must match /^_/u

'event' is defined but never used. Allowed unused args must match /^_/u

'event' is defined but never used. Allowed unused args must match /^_/u

'rowIndex' is defined but never used. Allowed unused args must match /^_/u

'cellRef' is defined but never used. Allowed unused args must match /^_/u

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