Update shared eslint config

[mikecbrant]

We need to fix the shared eslint export to address to make it easier for consumers to use.

Please see proposed fix in mikecbrant/appsyncjs#29

The package.json file should use full ^X.Y.Z versions as opposed to just ^X as noted in tha proposed fix.

[charliecreates]

Expand this to see my work.

• Confirmed the shareable config package is packages/eslint-config, exposing index.mjs, config.mjs, and eslint.config.mjs; no other packages here publish ESLint config.
• Reviewed the consumption pattern in appsyncjs PR #29 to target a package‑root export rather than deep paths.
• Updated packages/eslint-config/package.json: moved eslint, eslint-config-xo-typescript, @typescript-eslint/parser, @typescript-eslint/eslint-plugin, eslint-plugin-import, eslint-import-resolver-typescript, eslint-plugin-unicorn, eslint-plugin-sonarjs, eslint-plugin-unused-imports from dependencies to peerDependencies, and mirrored them in devDependencies for local development.
• Normalized all relevant version ranges to explicit carets across peerDependencies and devDependencies per issue #8, including ^9.0.0, ^8.0.0, ^2.29.0, ^3.6.0, ^52.0.0, ^3.0.2, ^4.0.0.
• Kept @mikecbrant/prettier-config as a workspace devDependency in packages/eslint-config/package.json.

[charliecreates]

Opened a draft PR to fix the shared ESLint config export and align dependency ranges: #9

• Consumers can now import directly from the package root (no deep paths): import config from '@mikecbrant/eslint-config'.
• Moved ESLint and all plugins from dependencies to peerDependencies so consumers own a single copy (prevents duplicate plugin instances with ESLint v9 flat config). Kept them in devDependencies for local development.
• Verified all ranges use explicit caret format ^X.Y.Z as requested.
• Mirrors the approach from appsyncjs PR 29 for easier consumption: docs(eslint): v9 flat‑config duplication — repro, root cause, resolution plan (APPSYNC-22) appsyncjs#29

Changes

• @mikecbrant/eslint-config
  • package.json
    • Move eslint, @typescript-eslint/*, eslint-config-xo-typescript, eslint-plugin-{import,unicorn,sonarjs,unused-imports}, eslint-import-resolver-typescript from dependencies → peerDependencies.
    • Add the same packages under devDependencies so this package can lint itself locally.
    • Confirm “exports” already maps “.” → ./index.mjs; and index.mjs simply re-exports the flat config from ./config.mjs. This enables top-level imports: import config from '@mikecbrant/eslint-config'.
    • Ensure all versions use full caret form ^X.Y.Z (no bare ^X anywhere).

Verification

# Install (workspace)
$ pnpm install -w

# Prettier: All matched files use Prettier code style
$ pnpm -w run fmt:check

# ESLint (scoped to the config package): no findings
$ pnpm -s -F @mikecbrant/eslint-config exec eslint .

# TypeScript (repo has no TS sources): placeholder script succeeds
$ pnpm -w run typecheck:tsgo

Notes

• Optional follow-up: we can declare typescript as a peer for clearer install-time guidance. The @typescript-eslint packages already surface this via their own peers, so I kept scope minimal to match the issue and the referenced PR. If you want it added, I can push a quick follow-up commit.