Re-export public_ext from generated LocaleKeys file

[j4qfrost]

Closes #780.

Adds export 'package:easy_localization/src/public_ext.dart'; to the generated file's header. Consumers that already import the generated locale_keys.g.dart (e.g. import 'generated/locale_keys.g.dart';) now also pick up the Text.tr() / Text.plural() extensions without a second import 'package:easy_localization/easy_localization.dart'; line — eliminating the two-import requirement called out in the issue.

Summary by CodeRabbit

• New Features
  • Generated localization modules now automatically export localization utilities and extensions, providing developers with direct and simplified access to essential localization features without requiring manual imports throughout their projects.
  • This enhancement streamlines the localization workflow, reduces boilerplate code, and significantly improves the overall developer experience when building multilingual and internationalized applications across platforms.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 72d9588f-3a2d-45ec-aa3b-daa0b70c5cec

📥 Commits

Reviewing files that changed from the base of the PR and between 8fda76d and a0c4407.

📒 Files selected for processing (1)

• bin/generate.dart

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Walkthrough

The generator now adds an export directive for easy_localization's public extensions to the generated localization file's prologue, enabling users to access translation utilities through a single import rather than two separate imports.

Changes

Cohort / File(s)	Summary
Generator Export Enhancement bin/generate.dart	Added export directive export 'package:easy_localization/src/public_ext.dart'; to the generated file's prologue to re-export public extensions without modifying generation logic or key resolution behavior.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A hop, a skip, one line of cheer,
Export the extensions, crystal clear!
No more double imports to frustrate,
One bundle now—how truly first-rate! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Re-export public_ext from generated LocaleKeys file' accurately summarizes the main change: adding an export directive for public_ext to the generated locale keys file.
Linked Issues check	✅ Passed	The PR successfully implements the requirement from issue #780 by adding the export statement 'export 'package:easy_localization/src/public_ext.dart';' to the generated file header.
Out of Scope Changes check	✅ Passed	All changes are directly related to the linked issue #780 requirement; only the generator was modified to add the requested export directive with no extraneous modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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