[eas-cli] improve wording for additional usage

[kadikraman]

Why

Currently we print our information about extra use as "overages" which is misleading.

https://exponent-internal.slack.com/archives/C02123T524U/p1784989673512749

How

Replace "overages" -> "extra use" in the usage command and in the pre-build usage printout.

eas build (warning shown before starting a build, when over included credits)

Before

You've used 3 builds beyond your included credits this billing period ($4.50 in overages so far).
Additional builds continue at pay-as-you-go rates. See usage in billing.

After

You've used 3 builds beyond your included credits this billing period ($4.50 in additional usage so far).
Additional builds continue at pay-as-you-go rates. See usage in billing.

---

eas account:usage

Before

EAS Build
  Builds (plan): 50/50
  ████████████████████ 100%
  Builds (overage): 5 builds ($15.00)

EAS Update
  Unique Updaters (plan): 3,500/3,000 users
  ████████████████████ 100%
  Unique Updaters (overage): 500 users ($2.50)

Billing
  Base subscription: $19.00
  Current overages: $17.50
    Build overages: $15.00
      iOS large: 2 builds ($10.00)
    Update overages: $2.50
  Estimated bill: $36.50

After

EAS Build
  Builds (plan): 50/50
  ████████████████████ 100%
  Builds (additional usage): 5 builds ($15.00)

EAS Update
  Unique Updaters (plan): 3,500/3,000 users
  ████████████████████ 100%
  Unique Updaters (additional usage): 500 users ($2.50)

Billing
  Base subscription: $19.00
  Additional usage: $17.50
    Builds: $15.00
      iOS large: 2 builds ($10.00)
    Updates: $2.50
  Estimated bill: $36.50

Test Plan

Updated / added tests.

[claude]

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[github-actions]

Subscribed to pull request

File Patterns	Mentions
packages/eas-cli/**	@douglowder

Generated by CodeMention

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.11%. Comparing base (83b86b8) to head (6c15548).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4094      +/-   ##
==========================================
+ Coverage   61.93%   62.11%   +0.18%     
==========================================
  Files         990      990              
  Lines       44447    44447              
  Branches     9340     9340              
==========================================
+ Hits        27524    27602      +78     
+ Misses      15471    15403      -68     
+ Partials     1452     1442      -10     

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[github-actions]

🤖 AI code review

Decision: Approve with comments

One lint-related warning remains in the updated usage test: the eslint disable comment does not cover the control-character regex it is meant to suppress.

🟡 Warning (1)

• Disable comment does not cover the control-character regex — packages/eas-cli/src/commands/account/__tests__/usage.test.ts:245 (quality) · id:066a8f3dff49
  The eslint-disable-next-line no-control-regex comment only applies to the preceding const output = ... line, while the regex literal that triggers no-control-regex is on this later .replace(...) line. This leaves the lint violation unsuppressed and can make yarn lint fail.
  Suggestion: Move the disable comment directly above the .replace(...) line or use a block disable around the chained expression.

---

This review is advisory — it never blocks a merge and never auto-approves.

[github-actions]

✅ Thank you for adding the changelog entry!