451 document postman plugin

[Stewartsson]

Related Issue

Closes #451

Proposed Changes

• Authored a comprehensive plugin documentation guide at docs/plugins/postman.md outlining capabilities, prerequisites, and operational configurations.
• Added 3 real-world configuration architecture usage examples in clean yaml format contracts.
• Registered the Postman entry row alphabetically inside the Developer Workflow matrix list index table at docs/plugins/README.md.
• Confirmed all modified files adhere strictly to POSIX guidelines and terminate with exactly one trailing newline.

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 📝 Documentation

[Stewartsson]

Hi Mentor @DotDev262! I have successfully engineered and finalized the comprehensive documentation coverage for our Postman config provider plugin under Issue #451.

I have deployed a clean, highly technical two-file documentation pass addressing all review criteria:

1. Documentation Module: Generated docs/plugins/postman.md outlining the core ecosystem behavior, prerequisite desktop app dependencies, full config.yaml layouts, and 3 distinct real-world configuration examples.
2. Registry Table Sync: Registered the postman module definition alphabetically inside the Developer Workflow and Infrastructure segment of the shared plugins index matrix (docs/plugins/README.md).
3. Quality Standards: Confirmed all formatting criteria are tested, accurate, and comply with strict POSIX trailing blank row constraints.

The commits are verified and the build is 100% conflict-free. Ready for final sign-off and your merge pass! 🚀

[Stewartsson]

@DotDev262 is the any changes or error that need to be cleared please let me know i will work on it

[DotDev262]

Clean Postman docs — standard template, POSIX newlines, scoped. Approved.