add Getting Help section with Azure AI Foundry Developer Forum

[AezanPathan]

Append a “Getting Help” section to the end of README.md with the Azure AI Foundry Developer Forum badge/link.

Purpose

• Append a “Getting Help” section to the end of README.md with the Azure AI Foundry Developer Forum badge/link.
• Avoid duplicating Discord links/badges since they already exist in the README.
• Addresses issue Add AI Discord and Forum Links #44.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] New feature to existing sample
[ ] New sample
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

README updated?

The top-level readme for this repo contains a link to each sample in the repo. If you're adding a new sample did you update the readme?

[ ] Yes
[ ] No
[x] N/A

How to Test

• Get the code

git clone https://github.com/AezanPathan/mcp-dotnet-samples.git
cd mcp-dotnet-samples
git checkout docs/add-getting-help-forum-link

• Test the code

1) Open the README in this branch on GitHub:
   https://github.com/AezanPathan/mcp-dotnet-samples/blob/docs/add-getting-help-forum-link/README.md

2) Scroll to the very bottom and verify the new section appears with the exact heading:
   "Getting Help"

3) Confirm the badge renders and the link target is:
   https://aka.ms/foundry/forum
   (Click it to ensure it redirects to the Azure AI Foundry Developer Forum.)

4) Verify no duplicate Discord links/badges were added:
   - The existing Discord badge at the top remains
   - The “Next Steps” Discord link remains
   - No new Discord link was introduced in the new section

5) Optional (local): Open the README in VS Code and preview it (Ctrl/Cmd+Shift+V) to confirm rendering.

What to Check

• Only README.md was modified
• New section title: “Getting Help”
• Exact snippet added:

## Getting Help

If you have product feedback or errors while building visit:

[![Azure AI Foundry Developer Forum](https://img.shields.io/badge/GitHub-Azure_AI_Foundry_Developer_Forum-blue?style=for-the-badge&logo=github&color=000000&logoColor=fff)](https://aka.ms/foundry/forum)

• No other content or files changed

Other Information

README already includes Azure AI Community Discord links; per the issue rules, this PR intentionally adds only the forum badge/link and does not duplicate the Discord link