[DOCS] Clean up the overview docs in each Daffodil package

[damienwebdev]

• Clean up the overview docs in @daffodil/analytics-provider-data-layer
• Clean up the overview docs in @daffodil/analytics
• Clean up the overview docs in @daffodil/auth
• Clean up the overview docs in @daffodil/authorizenet
• Clean up the overview docs in @daffodil/cart-customer
• Clean up the overview docs in @daffodil/cart-store-credit
• Clean up the overview docs in @daffodil/cart
• Clean up the overview docs in @daffodil/category
• Clean up the overview docs in @daffodil/checkout
• Clean up the overview docs in @daffodil/contact
• Clean up the overview docs in @daffodil/content
• Clean up the overview docs in @daffodil/customer-auth
• Clean up the overview docs in @daffodil/customer-order
• Clean up the overview docs in @daffodil/customer-payment-authorizenet
• Clean up the overview docs in @daffodil/customer-payment
• Clean up the overview docs in @daffodil/customer-store-credit
• Clean up the overview docs in @daffodil/customer
• Clean up the overview docs in @daffodil/driver
• Clean up the overview docs in @daffodil/external-router
• Clean up the overview docs in @daffodil/forms
• Clean up the overview docs in @daffodil/geography
• Clean up the overview docs in @daffodil/navigation
• Clean up the overview docs in @daffodil/newsletter
• Clean up the overview docs in @daffodil/order
• Clean up the overview docs in @daffodil/payment
• Clean up the overview docs in @daffodil/paypal
• Clean up the overview docs in @daffodil/product-composite
• Clean up the overview docs in @daffodil/product-configurable
• Clean up the overview docs in @daffodil/product
• Clean up the overview docs in @daffodil/related-products
• Clean up the overview docs in @daffodil/reviews
• Clean up the overview docs in @daffodil/router
• Clean up the overview docs in @daffodil/search-category
• Clean up the overview docs in @daffodil/search-product-composite
• Clean up the overview docs in @daffodil/search-product-configurable
• Clean up the overview docs in @daffodil/search-product
• Clean up the overview docs in @daffodil/search
• Clean up the overview docs in @daffodil/seo
• Clean up the overview docs in @daffodil/upsell-products