FEATURE: Support null footprints from component def #909

Job	Run time
Documentation Style Check	16s
Code style	44s
Package library	20s
Tests and coverage (windows-latest, 3.8)	59s
Tests and coverage (windows-latest, 3.9)	54s
Tests and coverage (windows-latest, 3.10)	1m 7s
Tests and coverage (ubuntu-latest, 3.8)	21s
Tests and coverage (ubuntu-latest, 3.9)	21s
Tests and coverage (ubuntu-latest, 3.10)	22s
Doc build	8m 51s
Build and Smoke tests (windows-latest, 3.8)	1m 31s
Build and Smoke tests (windows-latest, 3.9)	1m 32s
Build and Smoke tests (windows-latest, 3.10)	1m 31s
Build and Smoke tests (ubuntu-latest, 3.8)	22s
Build and Smoke tests (ubuntu-latest, 3.9)	28s
Build and Smoke tests (ubuntu-latest, 3.10)	17s
Deploy development documentation	0s
Release project	0s
Deploy stable documentation	0s
	19m 56s

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