Update to eslint 9 (#40555)

Eslint 9 brings a new config format, which means this PR also rewrites
all the eslint configs. I took the opportunity to clean them up
(although a good bit of that wound up in earlier PRs), and added code to
fetch the textdomain from composer.json and whether the project uses
React from package.json so we don't need to have so many boilerplate
configs that just set a textdomain or enable React rules.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/12280005125

Upstream-Ref: Automattic/jetpack@9e3ae2f

Author: anomiex

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.56.5-alpha] - unreleased
+
+This is an alpha version! The changes listed here are not final.
+
 ## [0.56.4] - 2024-12-09
 ### Changed
 - Updated package dependencies. [#40363]
@@ -783,6 +787,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Updated package dependencies.
 - Update package.json metadata.
 
+[0.56.5-alpha]: https://github.com/Automattic/jetpack-publicize/compare/v0.56.4...v0.56.5-alpha
 [0.56.4]: https://github.com/Automattic/jetpack-publicize/compare/v0.56.3...v0.56.4
 [0.56.3]: https://github.com/Automattic/jetpack-publicize/compare/v0.56.2...v0.56.3
 [0.56.2]: https://github.com/Automattic/jetpack-publicize/compare/v0.56.1...v0.56.2

composer.json

@@ -5,10 +5,10 @@
 	"license": "GPL-2.0-or-later",
 	"require": {
 		"php": ">=7.2",
-		"automattic/jetpack-connection": "^6.2.0",
+		"automattic/jetpack-connection": "^6.2.1-alpha",
 		"automattic/jetpack-autoloader": "^5.0.0",
 		"automattic/jetpack-config": "^3.0.0",
-		"automattic/jetpack-assets": "^4.0.1",
+		"automattic/jetpack-assets": "^4.0.2-alpha",
 		"automattic/jetpack-redirect": "^3.0.1",
 		"automattic/jetpack-plans": "^0.5.1",
 		"automattic/jetpack-status": "^5.0.1"

package.json

@@ -1,7 +1,7 @@
 {
 	"private": true,
 	"name": "@automattic/jetpack-publicize",
-	"version": "0.56.4",
+	"version": "0.56.5-alpha",
 	"description": "Publicize makes it easy to share your site’s posts on several social media networks automatically when you publish a new post.",
 	"homepage": "https://github.com/Automattic/jetpack/tree/HEAD/projects/packages/publicize/#readme",
 	"bugs": {