Fix parseAttribute Function to Handle Multiple Nodes

[theodesp]

Description

This PR addresses a bug in theparseAttribute function where it only checked the first node for the specified attribute when the selector was empty. The function has been updated to iterate through all nodes that match the selector and return the attribute value if found. Additionally, unit tests have been updated and expanded to cover these changes.

Fixes

#239

Testing

1. Add a core table into a page and adjust the alignment on a column (not the alignment of the table).
2. Add this into your page query:

    editorBlocks {
      ... on CoreTable {
        attributes {
          body {
            cells {
              align
            }
          }
          foot {
            cells {
              align
            }
          }
          head {
            cells {
              align
            }
          }
        }
      }
    }

Expected result. Align value should not be null

"data": {
    "posts": {
      "nodes": [
        {
          "editorBlocks": [
            {
              "name": "core/table",
              "attributes": {
                "body": [
                  {
                    "cells": [
                      {
                        "align": "center"
                      },
                      {
                        "align": null
                      }
                    ]
                  },
                  {
                    "cells": [
                      {
                        "align": "center"
                      },
                      {
                        "align": null
                      }
                    ]
                  }
                ],
                "foot": [],
                "head": [
                  {
                    "cells": [
                      {
                        "align": "center"
                      },
                      {
                        "align": null
                      }
                    ]
                  }
                ]
              }
            }
          ]
        },

[changeset-bot]

🦋 Changeset detected

Latest commit: 21adb13

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@wpengine/wp-graphql-content-blocks	Patch

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[ChrisWiegman]

LGTM