v2 beta: upgrade to dual ESM + CJS output, use confidential client as the client type

[cuzzlor]

• upgrade everything
• add esm + cjs dual output
• make all runtime deps ">= previous major version peer" deps
• fix types, use IConfidentialClientApplication

[Copilot]

Pull request overview

This PR prepares @makerx/express-msal v2 beta for a modern Node 20+ toolchain by adding dual ESM+CJS build output, updating lint/test tooling, and aligning the MSAL client typing to IConfidentialClientApplication.

Changes:

• Switch TypeScript config to Node 20 + no-emit typechecking, and introduce a dedicated build tsconfig for dist output.
• Replace tsc build with Rollup to emit both CJS and ESM artifacts, and migrate tests from Jest to Vitest.
• Update public API typing to accept an IConfidentialClientApplication and refresh docs/configuration files.

Reviewed changes

Copilot reviewed 16 out of 19 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
tsconfig.json	Move to Node 20 baseline and typecheck-only configuration.
tsconfig.build.json	Build-specific emit settings for declarations and dist output.
src/index.ts	Update MSAL client type to IConfidentialClientApplication and tighten response typing.
rollup.config.ts	New Rollup build for dual ESM + CJS outputs.
package.json	v2 beta versioning, Node engine bump, new build/lint/test scripts, peer/dev dependency updates.
jest.config.ts	Remove Jest configuration as part of Vitest migration.
eslint.config.mjs	New ESLint flat-config setup using @makerx/eslint-config.
README.md	Update package name, examples, and Express 5 note; fix minor wording.
.vscode/tasks.json	Add VS Code tasks for lint and typecheck.
.tstoolkitrc.ts	Add ts-toolkit config for copy-package-json step.
.prettierrc.cjs / .prettierrc	Switch to shared Prettier config package.
.nsprc	Document advisory suppression rationale.
.gitignore	Expand ignored files (pnpm logs, IDE files, build output, env files, test results).
.github/workflows/publish.yml	Switch to trusted publishing workflow.
.eslintrc.js / .eslintignore	Remove legacy ESLint config files.
.editorconfig	Update max line length to 100.

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