shellrc: added alias tdiskusage #188

Job	Run time
linux/fedora:41/admin / bootstrap	3m 49s
linux/fedora:40/admin / bootstrap	3m 36s
linux/fedora:41/dev_single / bootstrap	3m 53s
linux/fedora:40/dev_single / bootstrap	3m 20s
linux/archlinux:latest/admin / bootstrap	5m 15s
linux/archlinux:latest/dev_single / bootstrap	5m 8s
macos/macos-14/admin / bootstrap	1m 29s
macos/macos-14/dev_single / bootstrap	35s
macos/macos-13/admin / bootstrap	3m 21s
macos/macos-13/dev_single / bootstrap	1m 33s
	31m 59s

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