fix(release): sync versions to v0.4.0 and wire up semantic-release npm plugin

- Add @semantic-release/npm (npmPublish: false) to bump root package.json
- Add prepareCmd to exec plugin to sync Cargo.toml on each release
- Add Cargo.toml to @semantic-release/git assets
- Manually advance package.json and Cargo.toml from 0.1.0 → 0.4.0

package.json

@@ -1,7 +1,7 @@
 {
 	"name": "openconcho",
 	"private": true,
-	"version": "0.1.0",
+	"version": "0.4.0",
 	"packageManager": "pnpm@10.33.2",
 	"scripts": {
 		"dev": "pnpm --filter @openconcho/desktop dev",
@@ -20,6 +20,7 @@
 		"@semantic-release/exec": "^7.1.0",
 		"@semantic-release/git": "^10.0.0",
 		"@semantic-release/github": "^10.0.0",
+		"@semantic-release/npm": "^13.1.5",
 		"@semantic-release/release-notes-generator": "^14.0.0",
 		"husky": "~9.1.7",
 		"semantic-release": "catalog:",