Add CI build workflow

[Malcolmnixon]

This PR adds a CI build workflow which assembles:

• The Windows x86_64 release build
• The Linux x86_64 release build
• The Android aarch64 release build
• The iOS release build
• The GDMP Asset package (with libraries, license, and readme)

It did require a fix to the generate_bindings function in setup.py to restore the working directory after generating the bindings.

[Malcolmnixon]

Added iOS build

[GeorgeS2019]

@j20001970 => thank you for looking into it

Attempting v0.10.11 here.
https://github.com/Malcolmnixon/GDMP/actions

The feedback to mediapipe community
google-ai-edge/mediapipe#5366

[Malcolmnixon]

I've incorporated the changes you requested. At some point we may want to break the operating system jobs into reusable workflows with parameterized inputs; but this at least gets a starting workflow.

[j20001970]

Thanks!