fix(usage): restore commandcode quota + timeout guards lost in master merge

The -X theirs merge of origin/master (v0.5.69) silently reverted five
branch-only hunks because upstream had no conflict-region counterpart
and simply won the three-way pick:

* services/usage.js: re-register the commandcode USAGE handler +
  import. Without it the dashboard Quota Tracker fell through to
  'Usage API not implemented for commandcode'. The handler module
  (services/usage/commandcode.js) and registry usage block survived;
  only the dispatch entry was dropped.
* ProviderLimits/utils.js: restore parseQuotaData 'commandcode' case
  (currency-credit rows need unit "$" + remainingPercentage
  forwarding, else $0.05 balances render as 0%).
* profile + providers/[id] pages: restore Math.max(1000, ...) connect
  timeout floors so a stray '60' is never interpreted as 60ms.
* .gitignore: re-add .commandcode/ CLI local state.

Verified: tests/unit/commandcode-usage.test.js (6) and
usage-dispatch.test.js (2, asserts every provider routes to a real
handler) pass standalone; full unit run 1742 pass / 107 fail vs
1738/111 before this fix (remaining failures pre-existing, unrelated).

.gitignore

@@ -88,4 +88,7 @@ graphify-out/*
 .next-analyze/*
 
 # Kiro local workspace state
-.kiro/
+.kiro/
+
+# CommandCode CLI local state (auth/taste/projects)
+.commandcode/