MERC-7830 region name localization support

[kchu93]

Dependencies

• Paper-handlebars (This PR): PR to allow adding data-content-region-translation attribute
• Paper: Update to paper-handlebars version to support new data attribute
• Storefront-renderer: Update to paper version to support new parsing of region translations
• Stencil-cli: Update to stencil cli to parse translation from theme and generate manifest with new translation data.
• Page builder = Add support to use the correct translation if provided from schemaTranslations.

What? Why?

Region name localization support. This PR is to add content-region-translation data attribute if translation is provided in the html handlebars from the theme. This will be used to surface the correct translation on the front end (page builder) for a particular region.

How was it tested?

Steps to test

(1) Pull down the storefront-render PR and run locally (or can run the container image)

(2) Pull down stencil-cli PR and create theme with {{{region name="header_bottom" translation="i18n.RegionName.HeaderBottom"}}} and i18n.RegionName.HeaderBottom dummy translation within schema.json. EXAMPLE PROVIDED BELOW

(3) Change store language to non english language (chinese and french example provided)

(4) Upload test theme, load page builder and load layers pane to see the correct language.

Example Region + Schema.json

Region
{{{region name="header_bottom" translation="i18n.RegionName.HeaderBottom"}}}

Schema.json

  "i18n.RegionName.HeaderBottom": {
    "default": "Header Bottom",
    "en": "Header Bottom",
    "fr-FR": "Bas de l'en-tête",
    "zh": "标题底部",
    "zh-CN": "标题底部"
  }

cc @bigcommerce/storefront-team

[jkanive]

This LGTM 👍