Content Refresh - "Authentication for hosted storefronts"

[bc-Vince]

Rewrote article to cover all authentication methods and provide more usage information

DEVDOCS-6251

What changed?

• Article now covers all endpoints and mutations for generating S2S and storefront authTokens
• There are introductory sections for S2S and storefront authTokens with descriptions and considerations
• Certain Authentication requests include example bodies, or suggestions on how to implement Fetch requests
• There is a Resources section with links to relevant Authentication docs

Release notes draft

• As part of our ongoing content refresh for B2B Edition developer documentation, we've fully refreshed Authentication for hosted storefronts This includes:
  • Descriptive information and considerations for using server to server and storefront authTokens
  • Sections covering usage and examples for each Authentication request

Anything else?

ping @bc-terra

[github-actions]

Remaining comments which cannot be posted as a review comment to avoid GitHub Rate Limit

remark-lint

docs/b2b-edition/authentication/hosted-auth.mdx|217 col 140| authToken is misspelt retext-spell retext-spell
docs/b2b-edition/authentication/hosted-auth.mdx|223 col 182| authToken is misspelt retext-spell retext-spell
docs/b2b-edition/authentication/hosted-auth.mdx|227 col 36| authToken is misspelt retext-spell retext-spell
docs/b2b-edition/authentication/hosted-auth.mdx|229 col 104| authToken is misspelt retext-spell retext-spell