docs: added ecommerce recipe

[shahednasser]

• Added ecommerce recipe
• Fixed z-index of details component
• Added links to use case stories
• Changed B2B recipe name

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Latest commit: 03452c8

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Name	Status	Preview	Comments	Updated (UTC)
api-reference	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 11, 2023 3:40pm
medusa-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 11, 2023 3:40pm