Revert publisher back to esbenp

[ntotten]

Reverts publisher back to esbenp. See: #3872 (comment)

[Copilot]

Pull request overview

This PR reverts the extension publisher from prettier back to esbenp, reversing a previous migration attempt. The change updates all extension identifiers, marketplace URLs, and configuration examples in documentation and test files to use esbenp.prettier-vscode instead of prettier.prettier-vscode. The migration warning has also been removed from the README.

• Reverted publisher field in package.json from "prettier" to "esbenp"
• Updated all marketplace URLs and extension identifiers throughout documentation
• Removed the migration warning notice from README

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Reverted publisher to "esbenp" and updated homepage URL to use esbenp extension identifier
README.md	Updated all marketplace URLs, installation commands, and configuration examples to use esbenp.prettier-vscode; removed migration warning
CLAUDE.md	Updated extension identifier in project overview documentation
.vscode-test.mjs	Updated default formatter setting to use esbenp.prettier-vscode
.github/copilot-instructions.md	Updated extension identifier in Copilot instructions

Note: While the changes in this PR are consistent and correct, there are several other files in the repository (.devcontainer/devcontainer.json, .vscode/extensions.json, .vscode/settings.json, docs/troubleshooting.md, src/test/suite/testUtils.ts, src/test/web/suite/smoke.test.ts, and custom-instructions/repo/.github/copilot-instructions.md) that still contain references to prettier.prettier-vscode. These files are not part of this PR and should be updated in a follow-up to ensure complete consistency across the codebase and prevent test failures or configuration issues.