TCS-11: Add eslint-plugin-no-barrel-files rule to react config

[brettcutt-aligent]

Description of the proposed changes
Adds eslint-plugin-no-barrel-files to the shared react ESLint config so every consuming project picks up barrel-file enforcement without configuring it locally.

• Before: projects using eslintConfigs.react had no rule against barrel files; export * from … and re-exports of imported variables were silently allowed.

  // components/AddressForm/index.ts — passed lint
  export * from './AddressFields';
  export { default } from './AddressFields';

• After: any such file errors with no-barrel-files/no-barrel-files (Do not use export all or Do not re-export imported variable), via the plugin's flat/recommended config.

  // components/AddressForm/index.ts — now fails lint
  export * from './AddressFields';
  // ^ 1:1  error  Do not use export all (`export * from ...`)         no-barrel-files/no-barrel-files
  export { default } from './AddressFields';
  // ^ 2:1  error  Do not re-export imported variable (`./AddressFields`)  no-barrel-files/no-barrel-files

  Consumers should import from the source file directly instead:

  import AddressFields, { type AddressFieldsClassNames } from './AddressFields';

Screenshots (if applicable)
Symlinked and tested on the Takeflight project

Other solutions considered (if any)

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