Some operator overloads are not implemented

[amylizzle]

All operator overloads are parsed correctly, but only some are implemented and will be called.

• [x] A+B (#1808)
• [x] A-B (#1808)
• [ ] -A
• [x] A*B (#1808)
• [x] A/B (#1808)
• [ ] A%B
• [ ] A%%B
• [ ] A**B
• [x] A|B (#1808)
• [ ] A&B
• [ ] A^B
• [ ] ~A
• [ ] A<<B
• [ ] A>>B
• [ ] A<<B output (different function signature)
• [ ] A>>B input (different function signature)
• [ ] A~=B
• [ ] A~!B
• [ ] A<B
• [ ] A>=B
• [ ] A>B
• [ ] A<=B
• [ ] A+=B
• [ ] A-=B
• [x] A*=B (#1853)
• [x] A/=B (#1853)
• [ ] A%=B
• [ ] A%%=B
• [ ] A|=B
• [ ] A&=B
• [ ] A^=B
• [ ] A<<=B
• [ ] A>>=B
• [ ] A:=B
• [ ] ++A
• [ ] --A
• [ ] A++
• [ ] A--
• [x] A[] (#1888 )
• [ ] A[]=B
• [ ] turn(A, B)
• [ ] ""