Update Readme / HardwareX with List of Required Firmware Libraries

[ForrestErickson]

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name: Feature Request
about: Documenting the required firmware libraries, In the Firmware README.md and the HardwareX article.

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

On 20250912 Lee tried to compile the code at: moonratII\firmware_moonratII\production.
Got a compile time error related to the

Describe the solution you'd like
A clear and concise description of what you want to happen.
Warn development users of this and all required libraries.

[ForrestErickson]

Notes on installing library JC_Button@2.1.5,

For IDE version 2.3.6 the install went normally.

After installing library the code compiled.

Notes on compile results:
Sketch uses 91624 bytes (34%) of program storage space. Maximum is 262144 bytes.
Global variables use 10104 bytes (30%) of dynamic memory, leaving 22664 bytes for local variables. Maximum is 32768 bytes.
Erase flash