Fix linting errors in @gridweaver/react

[Copilot]

Two ESLint errors were failing the lint target for @gridweaver/react.

Changes

• AgTable.spec.tsx: Added eslint-disable-next-line for intentional empty function in never-resolving Promise (tests loading state)
• AgTable.tsx: Removed unused _event parameter from handleCellClicked and its CellClickedEvent import

// Before
private handleCellClicked = (_event: CellClickedEvent) => {
  // Cell click handler - can be extended via gridProps.onCellClicked
};

// After
private handleCellClicked = () => {
  // Cell click handler - can be extended via gridProps.onCellClicked
};

Original prompt

fix the linting error

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[jchoi2x]

@copilot whats going on with Projects must list all files or use an 'include' pattern. warnings when you build?

[Copilot]

@copilot whats going on with Projects must list all files or use an 'include' pattern. warnings when you build?

Those Projects must list all files or use an 'include' pattern warnings are pre-existing TypeScript declaration file generation issues unrelated to this PR. I verified by building with the original code before my changes - the same warnings appear. They occur during the vite:dts plugin's declaration file generation because libs/react/tsconfig.lib.json doesn't properly reference the @gridweaver/core source files. The build still succeeds; these are TypeScript configuration issues that would require a separate fix to the tsconfig setup.