feat(core/core-tracing): migrate to #platform/* imports

[deyaaeldeen]

Migrate @azure/core-tracing to #platform/* conditional imports:

• #platform/state — platform-specific global state storage (CJS/ESM/browser)
• Per-platform tsconfigs under config/, updated eslint/vitest/warp configs

[Copilot]

Pull request overview

This PR migrates @azure/core-tracing to use #platform/* conditional imports (starting with #platform/state) and aligns the package’s build/test configuration with the repo’s newer per-platform config/ tsconfig layout.

Changes:

• Introduces #platform/state and routes platform-specific state via package.json#imports + per-platform state modules.
• Reorganizes TypeScript project references into sdk/core/core-tracing/config/*.json and updates Warp/Vitest/ESLint configs accordingly.
• Updates Vitest browser config to re-export the shared repo browser config.

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
sdk/core/core-tracing/warp.config.yml	Points Warp targets at per-platform tsconfigs under ./config/.
sdk/core/core-tracing/vitest.config.ts	Updates aliasing for the renamed CJS state artifact.
sdk/core/core-tracing/vitest.browser.config.ts	Switches to re-export the shared eng/vitestconfigs/browser.config.ts.
sdk/core/core-tracing/tsconfig.json	Replaces legacy tsconfig references with ./config/* references.
sdk/core/core-tracing/package.json	Updates sample/test scripts and adds imports mapping for #platform/state.
sdk/core/core-tracing/src/instrumenter.ts	Switches state import from ./state.js to #platform/state.
sdk/core/core-tracing/src/state.ts	Updates the shared-state bridge to reference the renamed CJS state file.
sdk/core/core-tracing/src/state-web.mts	Tightens typing of the browser state singleton.
sdk/core/core-tracing/src/state-cjs.ts	Tightens typing of the CJS state singleton.
sdk/core/core-tracing/eslint.config.mjs	Adds local ESLint flat config pointing at config/tsconfig.lint.json.
sdk/core/core-tracing/config/tsconfig.*.json	Adds new per-platform src/test/lint/samples/snippets tsconfigs.
sdk/core/core-tracing/tsconfig.*.json (deleted)	Removes legacy root-level tsconfigs in favor of config/.