feat: add support for custom topology #419

Job	Run time
Unit Tests	1m 45s
Formatting	34s
test-jobs (post, 100)	7m 48s
test-jobs (batch, 100)	7m 44s
test-jobs (timed, 100)	7m 35s
test-jobs (debug, 100)	7m 52s
test-jobs (volumes, 100)	8m 10s
test-jobs (hello-world, 100)	8m 19s
test-jobs (nginx-service, 100)	7m 24s
test-jobs (custom-config, 100)	7m 49s
test-jobs (minimal-service, 100)	7m 54s
test-jobs (existing-volumes, 100)	7m 54s
test-jobs (flux-resource-list, 100)	7m 46s
test-jobs (nginx-sidecar-service, 100)	7m 56s
test-jobs (pokemon, ghcr.io/rse-ops/pokemon:app-latest, 100)	8m 26s
test-jobs (snakemake, ghcr.io/rse-ops/atacseq:app-latest, 100)	8m 29s
test-jobs (singularity, ghcr.io/rse-ops/singularity:tag-mamba, 100)	8m 30s
test-jobs (lammps, ghcr.io/converged-computing/metric-lammps:latest, 100)	8m 39s
test-jobs (disable-view, ghcr.io/rse-ops/lammps:flux-sched-focal, 100)	8m 20s
	2h 18m 54s

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