chore: initialize advanced-chart-core package

[sahar-fehri]

Explanation

Initialize advanced-chart-core package.

This is scaffolding only — a standard package skeleton with a placeholder greeter export and Jest test. The actual chart engine implementation will follow in a stacked PR.

What this PR does

• Adds @metamask/advanced-chart-core workspace package (dual MIT/Apache license, changelog, README, build/test/docs scripts)
• Placeholder greeter named export + test
• Monorepo wiring:
  • codeowners.ts / CODEOWNERS — ownership assigned to @MetaMask/metamask-assets, @MetaMask/perps, @MetaMask/social-ai
  • teams.json — adds advanced-chart-core entry
  • tsconfig.json / tsconfig.build.json — adds project references
  • README.md — adds package to list and dependency diagram
  • yarn.lock — updated

References

• Implementation PR will follow as a stacked PR on top of this branch
• Related to chore: create advanced charts core package #9762

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
New isolated package skeleton with no changes to existing controllers or client integration paths.

Overview
Adds @metamask/advanced-chart-core as a new workspace package with the usual monorepo scaffolding (dual MIT/Apache licensing, build/test/docs scripts, TypeDoc/Jest config, and an Unreleased changelog aimed at a future TradingView WebView engine).

Runtime code is placeholder only: a greeter export plus a small Jest test; there is no chart engine or host transport in this diff.

Monorepo wiring registers the package in root tsconfig references, README package list and Mermaid graph, yarn.lock, oxlint-suppressions for its Jest config, and ownership via CODEOWNERS, codeowners.ts (@MetaMask/metamask-assets, @MetaMask/perps), and teams.json (team-assets).

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