Run codeql anaysis on all platforms

[UncleGrumpy]

Add codeql to esp32-build.yaml workflow
Add codeql to pico-build.yaml workflow
Add codeql to stm32-build.yaml workflow
Add codeql to wasm-build.yaml workflow

These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).

SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[UncleGrumpy]

This does reveal some new issues for esp32, rp2, and wasm ports.

[bettio]

If you agree I wouldn't change release-0.6, except for the obvious fixes and CI updates to keep it working. What do you think? If you agree I would target main and merge it.

[UncleGrumpy]

I don't have a strong opinion, my reasoning behind targeting 0.6 was to help catch any regressions that future bug fixes may introduce, and to expose the few bugs in the pico and enscripten platforms that this will reveal after merging - but those are likely the same in main.

I will rebase this on main later today.

[UncleGrumpy]

Now rebased on main.