feat(wasm): support building for webassembly target

[doinkythederp]

Describe the changes this PR makes. Why should it be merged?

This PR adds support for building for WebAssembly to be simulated.

• Cargo config has updated linker flags
  • Memory is no longer shared because there is no need to simulate FreeRTOS task switching. Before, the simulator would essentially do multithreading (but only run 1 thread at once). Multithreading in WASM requires memory to be marked as shared.
  • Indirect function table is now imported instead of exported. This makes it easier to develop the simulator because the jump table can be set up before booting. I didn't do this with the memory because it seems like Dlmalloc can't see imported memory and always returns OOM errors?
• Wasm32 is now a checked target by rust-analyzer; this was necessary for making sure everything compiled on both platforms.
• Added NoopCriticalSection for WASM
  • WASM doesn't have interrupts or any way to disable them so I'm pretty sure it's safe. Also because the module's memory is not shared there is guaranteed to not be any multithreading.
• Cfg's for ARM assembly
  • The operations being performed at the start of the program aren't actually necessary in WASM.

Additional Context

• I have tested these changes on a VEX V5 brain.
• I have tested these changes in a simulator.

[doinkythederp]

I've updated the examples I modified to actually do what their name suggests. Also, I removed the unstable WASM feature flags because they were only needed for FreeRTOS emulation.

[Gavin-Niederman]

Please fix the warning about missing documentation.

[Tropix126]

LGTM otherwise

[Gavin-Niederman]

LGTM (Lets Get That wasM)

[Tropix126]

LGTM