docs(chart): correct loading and data-empty prop types to boolean in documentation

[IKEYCY]

…documentation

PR

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our Commit Message Guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

Summary by CodeRabbit

• Bug Fixes
  • Chart component properties loading and data-empty corrected from object type to boolean type, with default value of false.
  • Type corrections applied consistently across all chart API definitions and examples for improved type consistency.

[coderabbitai]

Walkthrough

Six chart API configuration files were updated to convert two properties (loading and data-empty) from object type with empty string defaults to boolean type with false defaults, standardizing the property definitions across demo, docs, events, question, and main API files.

Changes

Cohort / File(s)	Summary
Chart API property type standardization examples/sites/demos/apis/chart\*-*.js, examples/sites/demos/apis/chart.js	Changed loading property from type: 'object', defaultValue: '' to type: 'boolean', defaultValue: 'false'; changed data-empty property from type: 'object', defaultValue: '' to type: 'boolean', defaultValue: 'false' across all six chart API configuration files

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Highly repetitive changes across six files (same two properties updated identically in each file)
• Straightforward type and default value modifications with no logic implications
• Consistent pattern enables efficient parallel review across all affected files

Poem

🐰 Boolean hops where objects once dwelled,
False defaults now clearly propelled,
Loading and empty states, true and bright,
Six files aligned—the types all right!
⏳✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: correcting prop types for 'loading' and 'data-empty' to boolean across chart documentation files.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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