feat: Make library name configurable in PostHog analytics.

[vlidholt]

Summary by CodeRabbit

• Enhancements
  • Analytics tracking now supports configurable per-instance library names, enabling greater flexibility in multi-instance deployments.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Modified PostHogAnalytics class to support configurable library names per-instance. Replaced hard-coded 'cli_tools' library identifier with a constructor parameter that defaults to the original value, allowing customization while maintaining backward compatibility.

Changes

Cohort / File(s)	Summary
PostHog Library Name Configuration packages/cli_tools/lib/src/analytics/posthog.dart	Added static default library name constant and instance-level _libName field. Extended constructor with libName parameter (defaults to _defaultLibName) and updated track method to use configurable library name instead of hard-coded 'cli_tools'.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: making the library name configurable in PostHog analytics, which is the primary purpose of this PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[christerswahn]

LGTM!