-o, --output <COLUMNS> shouldn't be so strict

[Smithx10]

rust-triton-cli

❯ triton inst list -o compute_node
triton: error: unknown column 'compute_node'. Valid columns: SHORTID, NAME, IMG, STATE, FLAGS, AGE, ID, BRAND, PACKAGE, PRIMARYIP, CREATED

node-triton

❯ triton.bak inst list -o compute_node
COMPUTE_NODE
00cad45e-b701-ed11-8000-3cecefdc4310
00acb28e-7c01-ed11-8000-3cecefdc3cca
00d499a5-6501-ed11-8000-3cecefdc431e
00cad45e-b701-ed11-8000-3cecefded1de
00ccac61-7101-ed11-8000-3cecefe18fe2
00a8d320-af01-ed11-8000-3cecefdc4324
0004404a-ae01-ed11-8000-3cecefe18ff0