feat(@schematics/angular): use signal in app component #1635

Job	Run time
build	14s
lint	2m 4s
e2e_windows (windows-2025, 22, npm, 1)	1m 1s
e2e_windows (windows-2025, 22, npm, 0)	59s
e2e_windows (windows-2025, 22, npm, 3)	59s
e2e_windows (windows-2025, 22, npm, 4)	1m 0s
e2e_windows (windows-2025, 22, npm, 2)	1m 7s
e2e_windows (windows-2025, 22, npm, 5)	57s
e2e_windows (windows-2025, 22, esbuild, 1)	1m 16s
e2e_windows (windows-2025, 22, esbuild, 0)	27s
e2e_windows (windows-2025, 22, esbuild, 2)	1m 7s
e2e_windows (windows-2025, 22, esbuild, 4)	1m 51s
e2e_windows (windows-2025, 22, esbuild, 3)	1m 8s
e2e_windows (windows-2025, 22, esbuild, 5)	1m 7s
Browser Compatibility Tests	0s
test	0s
publish-snapshots	0s
e2e	0s
e2e-package-managers	0s
e2e-snapshots	0s
	15m 17s

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