chore(eslint): migrate eslint to avoid pnpm dep hoisting issue

[mikavilpas]

Issue

Eslint cannot be run after a clean install.

[Running: fd node_modules --no-ignore --prune -x rm -rf && pnpm i && cd integration-tests && pnpm eslint]
Scope: all 2 workspace projects
Lockfile is up to date, resolution step is skipped
Packages: +607
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Progress: resolved 607, reused 607, downloaded 0, added 607, done

devDependencies:
+ @umbrelladocs/linkspector 0.3.13
+ markdownlint-cli2 0.17.2
+ prettier 3.4.2
+ prettier-plugin-organize-imports 4.1.0
+ prettier-plugin-packagejson 2.5.8

Done in 4.8s

> @yazi.nvim/[email protected] eslint /Users/mikavilpas/git/yazi.nvim/integration-tests
> eslint --max-warnings=0 .

Oops! Something went wrong! :(

ESLint: 9.20.0

Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@eslint/eslintrc' imported from /Users/mikavilpas/git/yazi.nvim/integration-tests/eslint.config.mjs
Did you mean to import "@eslint/eslintrc/dist/eslintrc.cjs"?
    at packageResolve (node:internal/modules/esm/resolve:857:9)
    at moduleResolve (node:internal/modules/esm/resolve:926:18)
    at defaultResolve (node:internal/modules/esm/resolve:1056:11)
    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:654:12)
    at #cachedDefaultResolve (node:internal/modules/esm/loader:603:25)
    at ModuleLoader.resolve (node:internal/modules/esm/loader:586:38)
    at ModuleLoader.getModuleJobForImport (node:internal/modules/esm/loader:242:38)
    at ModuleJob._link (node:internal/modules/esm/module_job:135:49)
 ELIFECYCLE  Command failed with exit code 2.
[Command exited with 2, lasted 11.133123792s]

Solution

• Migrate the eslint config to the new flat config system.
• remove "legacy" typescript-eslint setup

Here is the PR where the breaking change was done

• Remove the default option *eslint* and *prettier* from public-hoist-pattern option in next major version pnpm/pnpm#8378

More information about the "flat config"

• https://eslint.org/blog/2022/08/new-config-system-part-2/

Other references I used

• Remove the default option *eslint* and *prettier* from public-hoist-pattern option in next major version pnpm/pnpm#8378
• https://typescript-eslint.io/packages/typescript-eslint/#migrating-from-legacy-config-setups
• ESLint config imports a transitive dependency that is not installed (pnpm 10) sveltejs/cli#374
• fix: add missing eslint import in generated package.json sveltejs/cli#375
• Types of exports in .nuxt/eslint.config.mjs is broken with pnpm v10 nuxt/eslint#539
• pnpm approve-builds ok but ESLint in vscode fail, pnpm v10.2.0. type: bug pnpm/pnpm#9052