Fix datatable content

[olexale]

Fix #108
This pull request improves the handling of data tables in BDD

[Copilot]

Pull Request Overview

This pull request fixes data table content handling in BDD by properly distinguishing between cucumber data tables and examples tables, addressing issue #108.

• Introduces a heuristic to differentiate between data tables intended as cucumber arguments versus examples for parameter expansion
• Updates generated test code to properly quote column headers in data table definitions
• Adds comprehensive test coverage for the new scenario outline functionality with data table variables

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
test/data_tables_test.dart	Updates expected test outputs with quoted column headers and adds new test case for scenario outline with data table variables
lib/src/scenario_generator.dart	Implements logic to handle placeholders differently in step text versus data table arguments for scenario outlines
lib/src/feature_file.dart	Refactors line processing to use new data table examples detection logic
lib/src/data_table_parser.dart	Adds heuristic function to determine when tables should be treated as examples versus cucumber data tables

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[Copilot]

The variable text is not quoted as a string literal. Based on the pattern in the rest of the file, this should be 'text' to match the expected string format for data table headers.

Suggested change

	await iVerifyWelcomeMessagesWith(tester, 'initial', const bdd.DataTable([[text], ['Welcome']]));
	await iVerifyWelcomeMessagesWith(tester, 'initial', const bdd.DataTable([['text'], ['Welcome']]));