Clarify WireMock DSL static imports in docs

[Chandu0501]

Summary

• add an explicit WireMock static import snippet to the Java stubbing docs
• add the same import guidance to the request matching docs, where the DSL appears immediately

Closes #9.

Verification

• pnpm installn- pnpm approve-builds --alln- pnpm build rendered dist/docs/stubbing/index.html and dist/docs/request-matching/index.html with the new import snippet
• pnpm build still ends with the repo's pre-existing Windows copy-static-homepage hook failure that tries to copy to C:\C:...\dist\index.html after the site output is already generated