Add curl examples for all /network/* endpoints to the README

[Sulex45]

The network endpoints — /network-status, /network/base-fee, /network/validators, /network/ledger-timing — are documented in the README reference table but have no curl examples showing what a real request and response looks like. Add a collapsible

Details

block under each network endpoint in the README with a curl request example and a trimmed sample response.

Acceptance Criteria: All four network endpoints have a curl example and sample response in the README. Sample responses are accurate and trimmed to the most relevant fields.

[iwayemi5]

@iwayemi5 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would like to work on this issue as I have reviewed the scope, I should have a PR Ready in 50 minutes.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @iwayemi5 to this issue.

[fairbid01]

@fairbid01 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @fairbid01 to this issue.

[drips-wave]

Congratulations, @fairbid01! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @fairbid01: 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.

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