fix: monorepo script changes

Ensure that copying the .vsix to the root folder always works.
Also, make sure running npm i at root also runs postinstall scripts for workspaces.

Author: hayemaxi

package.json

@@ -21,7 +21,7 @@
     },
     "scripts": {
         "prepare": "ts-node ./scripts/prepare.ts",
-        "postinstall": "npm run buildCustomLintPlugin",
+        "postinstall": "npm run buildCustomLintPlugin && npm run postinstall -ws --if-present",
         "buildCustomLintPlugin": "npm run build -w plugins/eslint-plugin-aws-toolkits",
         "compile": "npm run compile -w packages/",
         "testCompile": "npm run testCompile -w packages/",

packages/toolkit/scripts/build/package.ts

@@ -148,7 +148,7 @@ function main() {
         console.log(`VSIX Version: ${packageJson.version}`)
 
         const vsixName = `aws-toolkit-vscode-${packageJson.version}.vsix`
-        fs.moveSync(vsixName, `../../${vsixName}`)
+        fs.moveSync(vsixName, `../../${vsixName}`, { overwrite: true })
     } catch (e) {
         console.log(e)
         throw Error('package.ts: failed')