LUA : restructure to manage prearm-checks

[Pradeep-Carbonix]

To manage pre-arm checks from multiple modules, this is subdivided into

• cx_build_in_test.lua : main module for built in tests
• cx_modules : directory containing all sub modules
• cx_utils : libraries support other modules

[robertlong13]

This is looking really good. Almost there.

I think we should tidy up the naming a bit. I'm not a fan of the way we've been putting cx in everything (maybe I'll have to fight @loki077 on that). Let's have the three of us hash that out in person.

[loki077]

Cx/carbonix as prefix is a just an easy way to find all carbonix files no other reason. I know the files are already in a folder which is mostly related to carbonix.

But I am not very attached to "cx_" to have a fight on this 😅

[loki077]

Also I will merge the ci speed up PR prior to this so the simlink won't be needed.

[loki077]

Is the auto test part of the same PR ? @Pradeep-Carbonix @robertlong13

[robertlong13]

I was originally planning it to be, but it's too tightly coupled with my SITL PR.

What I'm now proposing is to make the CX_BIT auto test part of my SITL PR, then rebase this PR on that one and confirm it still passes.

[Pradeep-Carbonix]

This is looking really good. Almost there.

I think we should tidy up the naming a bit. I'm not a fan of the way we've been putting cx in everything (maybe I'll have to fight @loki077 on that). Let's have the three of us hash that out in person.

Changes the filesnames from :
├── cx_built_in_test.lua
├── cx_modules
│   └── cx_esc.lua
│ ├── cx_efi.lua [*Implemented in separate commit]
└── cx_utils
├── cx_aircraft.lua
└── cx_msg.lua

to this :
├── cx_built_in_test.lua
├── bit_subsystems
│   └── esc.lua
│ ├── efi.lua [*Implemented in separate commit]
└── utils
├── aircraft.lua
└── msg.lua

[loki077]

LGTM (with one Minor fix)