CD: reenable code signing on Windows

[agarny]

Fixes #347.

[Copilot]

Pull request overview

This PR re-enables Windows code signing in the CD (Continuous Deployment) workflow after the EV certificate was renewed, addressing issue #347. The changes restore the ability to sign Windows binaries during the automated build and release process.

Key changes:

• Re-enabled Windows EV certificate retrieval and code signing steps
• Updated version numbers to 0.20251222.0
• Updated @wasm-fmt/clang-format dependency from 21.1.6 to 21.1.7

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/cd.yml	Uncommented Windows code signing environment variables and certificate retrieval steps to restore code signing functionality; also includes unintended commented-out sections for release steps and jobs
package.json	Updated version to 0.20251222.0 and bumped @wasm-fmt/clang-format to 21.1.7
src/renderer/package.json	Updated version to 0.20251222.0
bun.lock	Updated lockfile to reflect @wasm-fmt/clang-format version change

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