Product left rail

[badvision]

This implements:

• Product page template with default content section width adjusted
• Placeholder for breadcrumb
• Left rail navigation with mobile show/hide logic as well

Fix #5, #6

Test URLs:

• Before: https://main--momentive--aemsites.hlx.live/drafts/sam/import-test/en-us/categories/polyurethane-additives/geocelltm-additive-gm-225#product-documentation
• After: https://product-left-rail--momentive--aemsites.hlx.live/drafts/sam/import-test/en-us/categories/polyurethane-additives/geocelltm-additive-gm-225#product-documentation

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

• [ ] Re-run PSI checks
• [ ] Re-sync branch

Commits

* [943ec65](https://github.com/aemsites/momentive/commit/943ec65a4e8097ae8e4e95c25cd7fdb7d995914e) :white_check_mark: (latest) * [8ab0dc7](https://github.com/aemsites/momentive/commit/8ab0dc7753d7eb251a748bf456c2ec9943cc4c10) :white_check_mark: * [886b0ba](https://github.com/aemsites/momentive/commit/886b0ba05de621d1b2d96ddff5587213e2260093) :white_check_mark: * [a7da690](https://github.com/aemsites/momentive/commit/a7da6904eb83b9f218c6d4d923daa34d2ed482d1) :white_check_mark:

[aem-code-sync[bot]]

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/drafts/sam/import-test/en-us/categories/polyurethane-additives/geocelltm-additi ve-gm-225