Implemented Aquacomputer Next Vision coolant temperature reading - #487

Read coolant temperature from an Aquacomputer Next Vision and give liquid
cooling its own sensor groups, so coolant and pump no longer borrow the
threshold colors of chip temperatures and case fans.

The Vision has no hwmon driver, so the reading comes from raw HID. It is a
composite device that also exposes keyboard and consumer control
interfaces, and only the vendor defined one reports telemetry, so match the
report descriptor usage page as well as the USB vendor and product id.
Reading either of the other interfaces blocks forever because they never
send a report. Telemetry arrives as a 64 byte report with id 0x01 holding
the coolant temperature at offset 0x37, big endian, in hundredths of a
degree.

Coolant runs far cooler than a CPU and a pump far faster than a case fan,
so sharing temperature-colors and fan-colors left their breakpoints
useless. Promote both to entries in sensorCatalog. The preference sidebar,
threshold color editors, changed:: signal wiring and dropdown menu groups
are all derived from that catalog, so each gains a page, a show-* toggle
and a *-colors key. The pump arrives on a fan input and is reassigned to
its own group by label, and fan inputs are now discovered when either group
is enabled.

colorsKeyForSensor() resolved format 'temp' to temperature-colors before
consulting the sensor's group, which made a per group scale impossible.
Check the group first and keep the format fallback so GPU temperatures
still share the temperature scale.

Coolant also gets its own unit. Threshold colors are matched against the
displayed value, so the unit and the breakpoints have to agree. The unit
key is resolved from the catalog, leaving every other temperature source on
the main unit.

Add an 'aggregate' catalog flag marking groups populated by hardware
monitor discovery, replacing the hardcoded group lists in the sensor query
dispatch and in the group average, minimum and maximum block.

sensorGroupFromType() only stripped '-group' and a trailing '#N', so a
suffixed type resolved to itself and missed its catalog entry. Fall back to
the leading segment.

Panel icon margins are declared per sensor type and also zero the padding,
so the new icons inherited the shell's system-status-icon padding and sat
wider apart than the rest. Add matching rules.

Ship water droplet and pump icons in both icon styles, and label several
nct6799 inputs for this board, including the fan7 input the pump reports
through.