fix(event): correctly parse project/event-id in view command

[sentry]

This PR fixes an issue where sentry event view <project>/<event-id> would fail with a ContextError: Event ID is required.

The root cause was that parseSingleArg in src/commands/event/view.ts was incorrectly delegating single-slash arguments like project/event-id to parseSlashSeparatedArg. The parseSlashSeparatedArg function, when encountering a single slash, assumes the format is org/project and that an event ID is missing, leading it to throw the ContextError.

The fix adds a specific check within parseSingleArg for the project/event-id pattern (where the part after the slash is a valid hex event ID) before the delegation to parseSlashSeparatedArg. This ensures that such arguments are correctly parsed and handled, preventing the erroneous ContextError.

Fixes CLI-CG

_{Comment @sentry <feedback> on this PR to have Autofix iterate on the changes.}

[github-actions]

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[github-actions]

Codecov Results 📊

❌ Patch coverage is 50.00%. Project has 5476 uncovered lines.
✅ Project coverage is 81.67%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
src/commands/event/view.ts	50.00%	⚠️ 1 Missing and 1 partials

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
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+ Coverage    81.67%    81.67%        —%
==========================================
  Files          425       425         —
  Lines        29868     29870        +2
  Branches     19398     19402        +4
==========================================
+ Hits         24393     24394        +1
- Misses        5475      5476        +1
- Partials      2033      2034        +1

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