chore: pin dependencies

[andreaskienle]

This PR pins our dependencies in package.json as recommended by Renovate.

It also moves the renovate config file to the .github folder and disables the dashboard (the one issue #35 we have)

[Copilot]

Pull Request Overview

This PR pins all dependency versions by removing caret prefixes (^) and updating to specific latest versions. This change provides more predictable builds and prevents automatic minor/patch version updates that could introduce breaking changes.

• Pin all production and development dependencies to exact versions
• Update dependencies to their latest compatible versions
• Disable Renovate dependency dashboard for cleaner automation

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
package.json	Pin all dependencies to exact versions and update to latest compatible releases
.github/renovate.json	Add configuration to disable dependency dashboard

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