Add MeanWell UHP-xxx DIN mount (#170)

MeanWell UHP-200/350/500 bracket to mount PSU across 2 DIN rails.
Uses MeanWell RS-25 brackets from standard V2.4 set.

printer_mods/README.md

@@ -26,6 +26,7 @@ like so:
 | Creator | Mod title | Description | V0 | V1.8 | V2.4 |
 | --- | --- | --- | --- | --- | --- |
 |aeresov|[TL filament sensor bracket](./aeresov/TL_filament_sensor_bracket)|A bracket for TL filament sensor to mount near stock spool holder. |:x:|:grey_question:|:heavy_check_mark:|
+||[MeanWell UHP-xxx DIN mount](./aeresov/TL_filament_sensor_bracket)|A bracket for MeanWell UHP series PSU (200, 350 and 500) to mount it across 2 DIN rails.|:x:|:grey_question:|:heavy_check_mark:|
 |arkeet|[Dial test indicator mount](./arkeet/dti-mount)|A toolhead mount for a dial test indicator, where the tip is located at the nozzle. |:x:|:heavy_check_mark:|:heavy_check_mark:|
 |Badnoob |[Precision AB Drive](./Badnoob/Precision_AB_Drive)|Changes the gearing for the AB drives to improve both resolution and torque, with a strenthened frame. |:grey_question:|:grey_question:|:heavy_check_mark:|
 | |[Rail Alignment](./Badnoob/Rail_Alignment)|Tools and procedure to properly align the rails in 2.4 and Afterburner|:x:|:x:|:heavy_check_mark:|

printer_mods/aeresov/MeanWell_UHP_DIN_mount/Readme.md

@@ -0,0 +1,30 @@
+
+<div style="text-align: right"><sub>A Team Dropbear Production</sub></div>
+<img align="right" width="100" height="100" src="images/db.png">
+
+# Voron 2.4 Trianglelab filament sensor bracket
+
+G'day, another nice thingy from down under. MeanWell UHP PSUs are great: nice, slim, compact, mains and DC on opposite sides... Well, but how to mount them on DIN rais? Alright, Dropbears to resque. Pick an adapter for your UHP (they have different width), print 2 of them and 4 of [rs25_psu_bracket_clip.stl](https://github.com/VoronDesign/Voron-2/blob/Voron2.4/STLs/VORON2.4/Electronics_Compartment/DIN_Brackets/rs25_psu_bracket_clip.stl). 
+
+Photos|
+------|
+![bracket top](images/photo1.png)|
+![bracket bottom](images/photo2.png)|
+
+## Printing and plasic
+
+Standard Voron part printing guidelines to follow: 0.4 nozzle, 0.2 layer height, etc.  
+This part is not exposed to any significant heat, so you could probably use even PLA.
+
+## Assembly
+
+BOM:
+* 8 x M3 hex nuts
+* 8 x M3x12 SHCS screws
+* 4 x M3 suare nuts
+* 4 x M3x10 SHCS screws
+
+Put square nuts in slide pockets, secure them with screws, then bolt down rs25 brackets, so square nuts are trapped.
+
+
+-that russian guy (aeresov#9959)