Parser: Transform Action View tag helpers inside control flow blocks

[marcoroth]

This pull request fixes a bug in the action_view_helpers parser analysis where tag helpers inside control flow blocks were not being transformed into HTMLElementNode AST representations. They remained as ERBContentNode, making them invisible to consumers relying on the transformed AST.

For example, the following template with action_view_helpers: true:

<% if condition? %>
  <%= tag.img src: "/image.png", alt: "Photo" %>
<% end %>

Previously produced:

  @ ERBIfNode (location: (1:0)-(3:9))
  ├── statements: (1 item)
  │   └── @ ERBContentNode (location: (2:2)-(2:48))
  │       ├── tag_opening: "<%=" (location: (2:2)-(2:5))
  │       ├── content: " tag.img src: \"/image.png\", alt: \"Photo\" " (location: (2:5)-(2:46))
  │       └── tag_closing: "%>" (location: (2:46)-(2:48))

Now correctly produces:

  @ ERBIfNode (location: (1:0)-(3:9))
  ├── statements: (1 item)
  │   └── @ HTMLElementNode (location: (2:2)-(2:48))
  │       ├── open_tag:
  │       │   └── @ ERBOpenTagNode (location: (2:2)-(2:48))
  │       │       ├── tag_opening: "<%=" (location: (2:2)-(2:5))
  │       │       ├── content: " tag.img src: \"/image.png\", alt: \"Photo\" " (location: (2:5)-(2:46))
  │       │       ├── tag_closing: "%>" (location: (2:46)-(2:48))
  │       │       ├── tag_name: "img" (location: (2:10)-(2:13))
  │       │       └── children: (2 items)
  │       │           ├── @ HTMLAttributeNode (name: "src", value: "/image.png")
  │       │           └── @ HTMLAttributeNode (name: "alt", value: "Photo")
  │       │
  │       ├── tag_name: "img" (location: (2:10)-(2:13))
  │       ├── body: []
  │       ├── close_tag: ∅
  │       ├── is_void: true
  │       └── element_source: "ActionView::Helpers::TagHelper#tag"

[pkg-pr-new]

npx https://pkg.pr.new/@herb-tools/formatter@1447

npx https://pkg.pr.new/@herb-tools/language-server@1447

npx https://pkg.pr.new/@herb-tools/linter@1447

commit: c0a7eb9

[github-actions]

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