fix(cursor): parse enterprise overall/pooled usage

[fcamus00]

Summary

• Enterprise/Team Cursor accounts always showed 100% remaining in the menu because the API response uses individualUsage.overall and teamUsage.pooled instead of the legacy individualUsage.plan block CodexBar's decoder knows about.
• Added CursorOverallUsage and CursorPooledUsage decoders, extended CursorIndividualUsage and CursorTeamUsage, and updated parseUsageSummary precedence so the personal cap (overall) wins, with the shared pool (pooled) as a last-resort fallback.
• USD figures now flow through from overall/pooled into planUsedUSD / planLimitUSD so the debug log surfaces the right dollars.

Compatibility

• Existing plan precedence (Pro / Hobby / Team with totalPercentUsed, lane percents, plan ratio) is unchanged — only adds new fallbacks below it.
• Legacy /api/usage request-based plan logic untouched.
• Menu UI / labels untouched (no new rows added; default Cursor flow is preserved).

Tests

3 new tests in Tests/CodexBarTests/CursorStatusProbeTests.swift:

• Decodes the live Enterprise JSON shape (overall + pooled).
• Confirms individualUsage.overall (73.84%) wins over teamUsage.pooled (45.25%) for the headline.
• Confirms pooled-only fallback when no individual data exists.
• Regression guard: legacy plan block still wins when present.

`swift test --filter CursorStatusProbeTests` → 32/32 green.

Verification

• Built and ran with `./Scripts/compile_and_run.sh`.
• Live Cursor Enterprise account that previously read 100% now correctly reflects ~26% remaining (matches Cursor's own dashboard).
• Verified via Preferences → Debug → Probe logs → Cursor.

Reproducer (sanitized live response)

```json
{
"membershipType": "enterprise",
"limitType": "team",
"isUnlimited": false,
"individualUsage": {
"overall": { "enabled": true, "used": 7384, "limit": 10000, "remaining": 2616 }
},
"teamUsage": {
"onDemand": { "enabled": true, "used": 0, "limit": null, "remaining": null },
"pooled": { "enabled": true, "used": 12725135, "limit": 28122000, "remaining": 15396865 }
}
}
```

Before: menu shows 100% remaining. After: shows ~26% remaining (73.84% used).

[ratulsarna]

THanks @fcamus00 for the contribution!