feat(application): add current command

[LorrisSaintGenez]

What

• Add algolia application current: show the selected application (ID, alias) and its name + plan
• Degrade gracefully: signed out → ID/alias + sign-in hint, API failure → ID/alias + warning; never triggers an interactive login
• Add IConfig.ApplicationAlias(appID) to resolve an app's alias from state.toml

Test

• algolia application current → app ID, alias (when set), name, plan
• algolia application current -o json → {"id":…,"alias":…,"name":…,"plan":…}
• algolia auth logout then algolia application current → ID/alias + Sign in with "algolia auth login" …, exit 0, no browser opened
• No application configured (fresh profile) → no current application configured; run "algolia application select" or "algolia auth login" first, non-zero exit

GROUT-409

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 35 complexity · 25 duplication

Metric	Results
Complexity	35
Duplication	25

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_{TIP This summary will be updated as you push new changes.}