[lexical] Feature: Add listStyleType support to ListNode for customizable list styles

[Tiscs]

Description

Add listStyleType support to ListNode for customizable list styles.

Test plan

Before

By default:

After

When set to 'circle'

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
lexical	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 10, 2025 1:13pm
lexical-playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 10, 2025 1:13pm

[etrepum]

Is there a reason why you decided to add this property instead of using listNode.setStyle('list-style-type: …') and implementing the __style property in createDOM/updateDOM/exportDOM? It's already there, it's just that the DOM methods aren't currently using it (not for a good reason).

[Tiscs]

Is there a reason why you decided to add this property instead of using listNode.setStyle('list-style-type: …') and implementing the __style property in createDOM/updateDOM/exportDOM? It's already there, it's just that the DOM methods aren't currently using it (not for a good reason).

The rationale for adding the __listStyleType property is to provide a more specific and type-safe way to control list styling, rather than reusing a generic __style property.