Add individual Node type for @textlint/ast-node-types

[azu]

We want to add individual Node type like Str, Code to @textlint/ast-node-types

Currently, @textlint/ast-node-types has three abustract types:

• TxtNode
• TxtTextNode
• TxtParentNode

We need to add TxtStrNode etc...

AST Node Type

• [ ] Add the definition of each Type
• [ ] Use these AST type in parser like txt-to-ast
• [ ] Use these AST type in https://github.com/textlint/textlint/blob/f9c3712df3cbefd314c5540824d828b97ab15d14/packages/%40textlint/types/src/Rule/TextlintRuleModule.ts#L15-L17

Type name	Node type	Description
ASTNodeTypes.Document	TxtParentNode	Root Node
ASTNodeTypes.Paragraph	TxtParentNode	Paragraph Node
ASTNodeTypes.BlockQuote	TxtParentNode	> Block Quote Node
ASTNodeTypes.List	TxtParentNode	List Node
ASTNodeTypes.ListItem	TxtParentNode	List (each) item Node
ASTNodeTypes.Header	TxtParentNode	# Header Node
ASTNodeTypes.CodeBlock	TxtParentNode	Code Block Node
ASTNodeTypes.HtmlBlock	TxtParentNode	HTML Block Node
ASTNodeTypes.Link	TxtParentNode	Link Node
ASTNodeTypes.Delete	TxtParentNode	Delete Node(~Str~)
ASTNodeTypes.Emphasis	TxtParentNode	Emphasis(*Str*)
ASTNodeTypes.Strong	TxtParentNode	Strong Node(**Str**)
ASTNodeTypes.Break	TxtNode	Hard Break Node(Str<space><space>)
ASTNodeTypes.Image	TxtNode	Image Node
ASTNodeTypes.HorizontalRule	TxtNode	Horizontal Node(---)
ASTNodeTypes.Comment	TxtTextNode	Comment Node
ASTNodeTypes.Str	TxtTextNode	Str Node
ASTNodeTypes.Code	TxtTextNode	Inline Code Node
ASTNodeTypes.Html	TxtTextNode	Inline HTML Node

Related #740

[azu]

Related #944

[azu]

We need to rethink about TxtNode

[azu]

TxtNode TxtNode is an abstract node. https://textlint.github.io/docs/txtnode.html

At the very least, it is strange that the <br/> is a TxtNode. It is not abstract. It is self closed node