Expand continuous integration coverage

[aidangarske]

• Existing CI covered only basic Ubuntu and macOS builds and had no nightly failure lifecycle.
• Adds a nightly coordinator that runs every CI workflow, opens or updates a failure issue, and closes it after recovery.
• Adds multi-compiler, CodeQL, Semgrep, Clang analysis, sanitizer, coverage, and configuration matrix jobs.
• Tests wolfSSL v4.8, v5.8, the latest stable release, and master without enforcing a minimum supported version.
• Runs Linux lwIP allow and deny tests, the wolfIP TAP example, and the notification TLS, UDP, and D-Bus flow.
• Compiles the STM32 examples and links the Cortex-M FreeRTOS and lwIP integration.
• Uses a pinned Docker environment and restricted container capabilities for reproducible CI.
• Validated with the native suite, example runtimes, Clang analysis, workflow syntax checks, and Skoll with zero remaining findings.

[github-advanced-security]

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