Add native self-hosted instance connection to fluxer_desktop

Trimmed monorepo checkout (fluxer_desktop + packages/voice_engine_v2 +
tools/ci) with a "Connect to a Different Server" menu item and popout
that lets the desktop app switch to any self-hosted Fluxer instance,
plus fixes for well-known discovery on single-domain self-hosted
deployments and a false-positive ERR_ABORTED on same-origin client
redirects during the switch. Defaults to chat.fluxr.chat and uses an
isolated userData directory from the official build.

packages/voice_engine_v2/package.json

@@ -0,0 +1,31 @@
+{
+	"name": "@fluxer/voice_engine_v2",
+	"version": "0.0.0",
+	"private": true,
+	"type": "module",
+	"exports": {
+		".": "./src/index.ts",
+		"./bridge": "./src/bridge/index.ts",
+		"./core": "./src/core/index.ts",
+		"./implementations": "./src/implementations/index.ts",
+		"./policies": "./src/policies/index.ts",
+		"./ports": "./src/ports/index.ts",
+		"./protocol": "./src/protocol/index.ts",
+		"./runtime": "./src/runtime/index.ts",
+		"./testing": "./src/testing/index.ts"
+	},
+	"main": "./src/index.ts",
+	"types": "./src/index.ts",
+	"scripts": {
+		"bench": "vitest bench --run",
+		"test": "vitest run",
+		"test:watch": "vitest",
+		"typecheck": "tsgo --noEmit"
+	},
+	"devDependencies": {
+		"@types/node": "catalog:",
+		"@typescript/native-preview": "catalog:",
+		"vite-tsconfig-paths": "catalog:",
+		"vitest": "catalog:"
+	}
+}