Fix(ext-proc-examples): Add RequestBody and ResponseBody handling in request processing

[abe-servescale]

When following the procedure in the page: link. I noticed an error when sending request to the ext-proc:
Unknown Request type &{body:"{\n \"path\": \"/myapp\",\n \"host\": \"www.example.com\",\n \"method\": \"GET\",\n \"proto\": \"HTTP/1.1\",\n \"headers\": {\n \"Accept\": [\n \"*/*\"\n ],\n \"User-Agent\": [\n \"curl/7.81.0\"\n ],\n \"X-Env │ │ oy-External-Address\": [\n \"127.0.0.1\"\n ],\n \"X-Forwarded-For\": [\n \"10.42.0.9\"\n ],\n \"X-Forwarded-Proto\": [\n \"http\"\n ],\n \"X-Request-Ext-Processed\": [\n \"true\"\n ],\n \"X-Request-Id\": [\n \"3cb7e724-0743-4509-ab4c-7df78decc7a0\"\ │ │ n ]\n },\n \"httpPort\": \"3000\",\n \"namespace\": \"default\",\n \"ingress\": \"\",\n \"service\": \"\",\n \"pod\": \"backend-7878cc679d-t9n7h\"\n}" end_of_stream:true}

I have solved the issue with this edit (done with chatgpt codex).

[netlify]

✅ Deploy Preview for cerulean-figolla-1f9435 ready!

Name	Link
🔨 Latest commit	f2f1f68
🔍 Latest deploy log	https://app.netlify.com/projects/cerulean-figolla-1f9435/deploys/6a59de27b660660008962413
😎 Deploy Preview	https://deploy-preview-9183--cerulean-figolla-1f9435.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.48%. Comparing base (4d7686c) to head (f2f1f68).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9183      +/-   ##
==========================================
- Coverage   75.48%   75.48%   -0.01%     
==========================================
  Files         252      252              
  Lines       41642    41642              
==========================================
- Hits        31435    31434       -1     
- Misses       8075     8077       +2     
+ Partials     2132     2131       -1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. Please feel free to give a status update now, ping for review, when it's ready. Thank you for your contributions!

[abe-servescale]

@guydc @arkodg Hi, do you need me to edit some things or this can be closed?

[arkodg]

LGTM thanks

[arkodg]

@abe-servescale, DCO is failing, can you sign your commit and force push