chore(web): upgrade ESLint and plugins (#22495)

* chore(web): upgrade ESLint and plugins, simplify linting configuration

- Update eslint from ^9.18.0 to ^9.36.0
- Update eslint plugins:
  - eslint-plugin-svelte: ^3.9.0 → ^3.12.4
  - eslint-plugin-unicorn: ^60.0.0 → ^61.0.2
  - svelte-eslint-parser: ^1.2.0 → ^1.3.3
  - typescript-eslint: ^8.28.0 → ^8.45.0
- Remove eslint-p dependency in favor of native eslint concurrency
- Add unicorn/no-array-sort rule exception
- Update linting scripts to use eslint's native --concurrency flag
- Update Makefile and mise.toml to reflect simplified lint commands
- Update GitHub Actions workflow to use standard pnpm lint command

* pnpm dedupe

---------

Co-authored-by: Ben McCann <322311+benmccann@users.noreply.github.com>

web/eslint.config.js

@@ -121,6 +121,7 @@ export default typescriptEslint.config(
       'unicorn/filename-case': 'off',
       'unicorn/prefer-top-level-await': 'off',
       'unicorn/import-style': 'off',
+      'unicorn/no-array-sort': 'off',
       'svelte/button-has-type': 'error',
       '@typescript-eslint/await-thenable': 'error',
       '@typescript-eslint/no-floating-promises': 'error',