feat: "found" field added to the Products Connection types

[kidunot89]

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What does this implement/fix? Explain your changes.

• Fixed ignore sticky post bug when reverse pagination products.
• Renames allowedCountryStates query to countryStates.
• Adds countries query for get a complete list all countries not just the one the store ships to.
• Adds the connection field found the product connections see example usage below
• Added lowStockAmount field to InventoriedProduct interface.

{
  products(first: 20) {
    found
    pageInfo {
      endCursor
    }
    nodes {
      id
    }
  }
}

The found field should only be resolved on the initial query from a connection without after or before cursors and will return null when cursors are provided. See screenshots below for output examples.

Does this close any currently open issues?

…

Any relevant logs, error output, GraphiQL screenshots, etc?

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Any other comments?

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Where has this been tested?

• WooGraphQL Version: …
• WPGraphQL Version: …
• WordPress Version:
• WooCommerce Version: