docs(aws-pricing-mcp-server): Add Windows installation instructions

[nspring00]

Fixes

Summary

Changes

• Add Windows installation instructions

User experience

Before, Windows users got errors when they used the (Mac/Linux) installation instructions.
After, they can copy the Windows-specific configuration.

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• I have reviewed the contributing guidelines
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Is this a breaking change? N

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the project license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.50%. Comparing base (d0c6e6b) to head (786b2e0).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #857      +/-   ##
==========================================
- Coverage   88.78%   88.50%   -0.29%     
==========================================
  Files         562      492      -70     
  Lines       38508    34947    -3561     
  Branches     5969     5504     -465     
==========================================
- Hits        34191    30929    -3262     
+ Misses       2790     2557     -233     
+ Partials     1527     1461      -66     

☔ View full report in Codecov by Sentry.
📢 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.