Deprecate Types enum and introduce NodeType enum for consistency with MarkType

[Copilot]

Overview

This PR deprecates the Types enum and introduces a new NodeType enum to maintain consistency with the existing MarkType enum. The change provides a clearer naming convention and better aligns with the library's architecture, while maintaining 100% backward compatibility.

Changes

New NodeType Enum

• Created src/NodeType.php with all 17 node types (doc, default, paragraph, blockquote, image, heading, youtube, bulletList, orderedList, listItem, text, codeBlock, horizontalRule, tableRow, tableCell, table, hardBreak)
• Follows the same structure and naming convention as MarkType.php

Deprecated Types as Empty Wrapper Class

• Converted src/Types.php from enum to a final class with public constants
• Each constant directly references the corresponding NodeType enum case (e.g., public const paragraph = NodeType::paragraph)
• The class is now truly "empty" - containing only constant references with no methods
• Added @deprecated annotation indicating it will be removed in a future major version

Updated Parser Class

• Changed internal implementation to use NodeType in getDefaultNodeRenderers()
• Updated replaceNode() method signature to accept only NodeType (since Types constants now return NodeType instances)
• Simplified type handling while maintaining full backward compatibility

Updated Documentation

• Changed all code examples in README.md to use NodeType
• Updated references from "refer to the Types class" to "refer to the NodeType class"

Added Tests

• Updated existing tests to use NodeType
• Added comprehensive backward compatibility test to ensure Types constants work correctly
• Verified that Types::paragraph === NodeType::paragraph and Types::paragraph instanceof NodeType

Migration Path

Users can migrate at their own pace without any breaking changes:

Before (still works):

$parser->replaceNode(\Nadar\ProseMirror\Types::paragraph, fn($node) => '...');

After (recommended):

$parser->replaceNode(\Nadar\ProseMirror\NodeType::paragraph, fn($node) => '...');

Both work identically since Types::paragraph returns NodeType::paragraph.

Backward Compatibility

✅ No breaking changes

• Existing code using Types will continue to work without modifications
• Types::paragraph is literally NodeType::paragraph (same object reference)
• Deprecation notice guides users toward the new API

Benefits

• Consistency: Aligns node type handling with mark type handling (MarkType)
• Clarity: NodeType is more descriptive than the generic Types
• Clean Architecture: Types is now an empty wrapper that delegates everything to NodeType
• Future-proof: Provides a clean deprecation path for eventual removal of Types

Warning

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Original prompt

i have #MarkType which is an enum class, and i have #Types.php which is also enum.

now i want that you deprecated Types.php and replace it with NodeType.php enum class (also use this new NodeType enum class file in the code and readme) - the old Types.php should be keept with deprecation warning so no bc break is introduced.

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[nadar]

but then Types should extend NodeType and Types should be "empty" @copilot

[Copilot]

but then Types should extend NodeType and Types should be "empty" @copilot

Done! Types is now an empty final class with constants that reference NodeType enum cases. Since PHP enums can't extend each other, this approach provides the cleanest wrapper where Types::paragraph directly returns NodeType::paragraph. Commit: e3f9c2b

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