Bump github/codeql-action from 3 to 4 - #4

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-node@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

src/diagram/mech.ts:401:17: Do not use `new Array(singleArgument)`.

src/diagram/mech.ts:400:48: Do not use `new Array(singleArgument)`.

src/diagram/mech.ts:368:17: Do not use `new Array(singleArgument)`.

src/sim/molecule.ts:229:19: Do not use `new Array(singleArgument)`.

src/sim/molecule.ts:228:15: Do not use `new Array(singleArgument)`.

src/sim/index.ts:351:16: Unexpected erasing operation. This expression will always evaluate to zero.

src/dashboard/Dashboard.tsx:69:60: Expected expression to be used

src/sim/mechanics.ts:563:9: Expected expression to be used

src/App.tsx:2662:9: Expected expression to be used

src/board.ts:55:7: Unexpected aliasing of 'this' to local variable.