[WIP] Update project documentation for clarity

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

https://github.com/Pond-Glyphs/sdks.git

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

---

Summary by cubic

Improved SDK documentation for clearer onboarding and faster setup. Reorganized guides, updated examples, and removed outdated content.

• Refactors
  • Restructured README with a clearer Quickstart and common tasks.
  • Standardized terms across pages; removed outdated references.
  • Updated install and auth steps; fixed broken links.

^{Written for commit 466bc60. Summary will update on new commits.}

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[Copilot]

Copilot wasn't able to review any files in this pull request.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.