feat(cli): add --json to remaining list/status commands

[emil07770]

Summary

Closes #142. Addresses #133.

Adds machine-readable --json output to the six CLI commands that were missing the convention (every status/list command should support --json):

Command	JSON shape
sh1pt config payments list --json	{ providers, defaultProvider }
sh1pt config stack list --json	{ stacks } (value/title/description/supported per entry)
sh1pt build entity compliance list <slug> --json	{ slug, tasks, filter }
sh1pt build entity status <slug> --json	{ slug, state, states }
sh1pt scale deploy status <id> --provider <id> --json	{ instanceId, provider, status, hourlyRate }
sh1pt promote ship target list --json	{ targets }

All six commands continue to print human-readable output when --json is omitted, preserving existing behavior.

Implementation details

• Each command follows the existing pattern: check opts.json, emit console.log(JSON.stringify(..., null, 2)), return early.
• config stack list --json reuses the existing STACKS constant (value/title/description/supported shape) so the data model is shared.
• entity compliance list passes through the --status filter value in the JSON response so callers can confirm the active filter.
• entity status includes the full lifecycle state machine (states array) so clients can render progress bars without hardcoding the sequence.

Test plan

• pnpm exec vitest run packages/cli/src/commands/json-output.test.ts — 10/10 pass
• pnpm --filter @profullstack/sh1pt typecheck — no errors
• git diff --check — no trailing whitespace

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