Fix docs package npx scaffolding command

[wowsofine]

Summary

• replace npx create-docs-mcp / npx create-docs-server examples with npx -p @mcpframework/docs create-docs-mcp
• align docs package references from @mcp-framework/docs to the published @mcpframework/docs package name
• update generated project templates and CLI usage text to match the published package/bin names

Why

The current README example asks users to run npx create-docs-mcp my-api-docs, but create-docs-mcp is not a published npm package. The executable is provided by @mcpframework/docs, so npm needs the package source specified.

Validation

• npm view create-docs-mcp version returns E404
• npx -y -p @mcpframework/docs@0.1.0 create-docs-mcp my-api-docs generates a project with @mcpframework/docs in dependencies
• npm run build
• cd packages/docs && npm run build && npm test -- --runInBand
• rg "@mcp-framework/docs|npx create-docs-mcp|npx create-docs-server" README.md packages/docs docs/docs-package returns no matches
• git diff --check

Notes

Root npm run lint currently fails on existing lint errors in dist/ and source files unrelated to this docs change. Root npm test -- --runInBand currently fails on Node 25 with jsonwebtoken / buffer-equal-constant-time prototype errors in existing OAuth/serverless suites, while many unrelated suites pass. This PR does not touch those files or dependencies.