feat: add `passwordFile`, `hashedPasswordFile`, `githubAuthTokenFile`… #53

Job	Run time
test-scenarios (code-server)	8m 25s
test-autogenerated (code-server, fedora:latest)	49s
test-global	6s
test-docs	7s
test-autogenerated (code-server, debian:latest)	47s
test-autogenerated (code-server, ubuntu:latest)	46s
test-autogenerated (code-server, mcr.microsoft.com/devcontainers/base:ubuntu)	50s
	11m 50s

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