G27 Shifters v2

This is the new version of my G27 shifters, here's what's new:

- An accent ring to add color to the Short and Long shifters.
- A customizable cap (I added a plain version if you want to make a custom cap for your shifter, If you do I would like to see it and maybe use it).
- A new ball shifter with a removable grip to print it in tpu.
- Wall holders for the shifters and the accent ring and caps.

__DETAILS;__

__Shifters:__

__1- Custom size;__
- The G27_Long_shifter_v2_part_1 will connect the g27 shifter shaft to a 11 mm steel rebar.
- You can make the rebar the length you want.
- I don't know if it's normal but my rebar was slightly oval (by a 1mm difference) so I had to make the holes oval, so if you have issues inserting it maybe try rotating it as it
may be oval too.
- The G27_Long_shifter_v2_part_2 will connect the 11 mm steel rebar to the G27 Shifters grip v2.
- It can be fitted with an accent ring and a cap.

__2-Short shifter;__
- The G27_Short_shi