Update middleware plugin documentation for function name and build command

[matheusandre1]

Closes: #4

Summary by CodeRabbit

• Documentation
  • Clarified the expected return type for middleware plugin functions, noting the supported handler interface and its adapter.
  • Corrected and expanded the example build command for better accuracy and consistency, including a fixed output path and updated build flags.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d653224c-d8f0-4608-99fb-be0ec387560a

📥 Commits

Reviewing files that changed from the base of the PR and between 06250cc and 65c404b.

📒 Files selected for processing (1)

• plugins/middleware-plugin.md

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📝 Walkthrough

Walkthrough

Documentation update in plugins/middleware-plugin.md clarifying that {Function Name}MiddlewareLoad should return negroni.Handler (not always negroni.HandlerFunc), and correcting the example build command's output path typo and adding build flags.

Changes

Middleware plugin documentation fixes

Layer / File(s)	Summary
Return type and build command corrections plugins/middleware-plugin.md	Documents that MiddlewareLoad functions return negroni.Handler (with negroni.HandlerFunc as an adapter), and fixes the go build example: corrects the midllewares typo to middlewares and adds -mod=vendor, -trimpath, and -ldflags "-s -w" flags.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the documentation-focused middleware plugin changes and mentions the two main updates.
Linked Issues check	✅ Passed	The PR updates the middleware plugin docs as requested in issue #4 by revising the function contract and build command.
Out of Scope Changes check	✅ Passed	The changes stay within the documentation update scope and do not introduce unrelated code or feature work.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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