fix: fix CI installer creation for all platforms

- Windows: add NSIS installation step via Chocolatey in CI workflow
- macOS: fix create-dmg CLI invocation to match sindresorhus package
  API (--overwrite, --no-version-in-filename, --no-code-sign) and
  rename output to expected asset name
- Add rename import to create-installer.ts

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/workflows/release.yml

@@ -131,6 +131,11 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y libsecret-1-dev
 
+      - name: Install NSIS
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: choco install nsis -y --no-progress
+
       - name: Install dependencies
         run: bun install --frozen-lockfile