Create codeql.yml - #63

We were unable to automatically build your code. Please change the build mode for this language to manual and specify build steps for your project. See https://docs.github.com/en/code-security/code-scanning/troubleshooting-code-scanning/automatic-build-failed for more information. Encountered a fatal error while running "/Users/runner/hostedtoolcache/CodeQL/2.25.2/arm64/codeql/codeql database trace-command --use-build-mode --working-dir /Users/runner/work/mobile_client/mobile_client /Users/runner/work/_temp/codeql_databases/swift". Exit code was 2 and error was: A fatal error occurred: Exit status 1 from command: [/Users/runner/hostedtoolcache/CodeQL/2.25.2/arm64/codeql/swift/tools/autobuild.sh]. See the logs for more details.

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/checkout@v4. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/