Add FAQ / troubleshooting guide

[Fatimasanusi]

Create a FAQ document covering common issues: "Freighter not detected", "Transaction failed", "Not enough shares", "Can't connect to testnet", etc. Include solutions and step-by-step troubleshooting instructions.
Checklist:

• Collect common issues from README and code
• Write clear problem → solution entries
• Add to docs/FAQ.md
• Link from README

[Chrisbankz0]

@Chrisbankz0 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would love to work on this issue. I have experience building production ready applications and collaborating through GitHub workflows. I'll carefully analyze the current implementation, propose a reliable solution, and submit a well-tested PR. My focus is on clean code, maintainability, and timely delivery

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Chrisbankz0 to this issue.

[Ultra-Tech-code]

@Ultra-Tech-code has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, I'd like to work on this issue.

I'll create a FAQ/troubleshooting guide covering common user issues, document clear problem-to-solution steps, add it as docs/FAQ.md, and update the README with a link to the new documentation.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Ultra-Tech-code to this issue.

[drips-wave]

Congratulations, @Chrisbankz0! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Chrisbankz0: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been marked as completed by a Drips Wave moderator for @Chrisbankz0 as part of the Stellar Wave Program's 6th Wave 🥳

Moderator's reason: [Auto-assessed] The contributor successfully completed the issue by creating a comprehensive FAQ/troubleshooting guide in docs/FAQ.md and linking it in the README. The PR has been merged by a maintainer and includes additional project hygiene improvements like license headers.

😎 @Chrisbankz0: You earned 100 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.

ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.