fix: update AISIX architecture diagram link in overview documentation

[LiteSun]

Summary by CodeRabbit

• Documentation
  • Updated image source references in README and documentation to use remote-hosted assets for logos and architecture diagrams.
  • Adjusted an architecture diagram's inline styling in the introduction overview to rely on hosted sizing (removed a restrictive max-width).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 36670bce-2e13-4d75-81d9-2c44ff031748

📥 Commits

Reviewing files that changed from the base of the PR and between ad9759d and cde6747.

📒 Files selected for processing (1)

• docs/introduction/overview.md

🚧 Files skipped from review as they are similar to previous changes (1)

• docs/introduction/overview.md

---

📝 Walkthrough

Walkthrough

This PR replaces local relative image paths with fully qualified remote URLs on static.api7.ai in two documentation files: README.md and docs/introduction/overview.md. One inline style (maxWidth:'800px') was removed from the overview image tag; no other content or code changed.

Changes

Cohort / File(s)	Summary
Documentation Asset URLs README.md, docs/introduction/overview.md	Replaced relative local image paths with absolute URLs hosted on static.api7.ai. Removed maxWidth:'800px' from the image style in docs/introduction/overview.md. No other textual or structural edits.

Sequence Diagram(s)

(omitted — documentation-only changes, no new multi-component control flow)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• docs: update the architecture which is much beautiful #8: Modifies docs/introduction/overview.md and also changes how the architecture diagram is included (Mermaid → static image).
• docs: fix wrong icon #9: Updates the architecture diagram reference in docs/introduction/overview.md (path/format changes).

Suggested reviewers

• moonming

Poem

🐇 I hopped through docs and found a trail,

Local pictures boarded a distant mail,
On static paths they now abide,
Neat and tidy, hosted with pride,
A rabbit's cheer for images worldwide. 🎨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: updating the AISIX architecture diagram link in the overview documentation, which is the primary focus of the PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sy/fix-image-url

---

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