Add D support

[azihassan]

Hello, this is my attempt to add D support to the runner. It requires ldc2 to be available. The code compiles but I'm not sure how to invoke it, let me know if there are changes that need to be made

[azihassan]

@chermehdi On Ubuntu, the LDC compiler can be installed with apt install ldc. It's also available via snap: snap install ldc2 --classic. A successful installation can be tested with ldc2 --version

$ ldc2 --version
LDC - the LLVM D compiler (1.24.0):
  based on DMD v2.094.1 and LLVM 11.0.0
  built with LDC - the LLVM D compiler (1.24.0)
  Default target: x86_64-unknown-linux-gnu
  Host CPU: sandybridge
  http://dlang.org - http://wiki.dlang.org/LDC

  Registered Targets:
    aarch64    - AArch64 (little endian)
    aarch64_32 - AArch64 (little endian ILP32)
    aarch64_be - AArch64 (big endian)
    amdgcn     - AMD GCN GPUs
    arm        - ARM
    arm64      - ARM64 (little endian)
    arm64_32   - ARM64 (little endian ILP32)
    armeb      - ARM (big endian)
    avr        - Atmel AVR Microcontroller
    mips       - MIPS (32-bit big endian)
    mips64     - MIPS (64-bit big endian)
    mips64el   - MIPS (64-bit little endian)
    mipsel     - MIPS (32-bit little endian)
    msp430     - MSP430 [experimental]
    nvptx      - NVIDIA PTX 32-bit
    nvptx64    - NVIDIA PTX 64-bit
    ppc32      - PowerPC 32
    ppc64      - PowerPC 64
    ppc64le    - PowerPC 64 LE
    r600       - AMD GPUs HD2XXX-HD6XXX
    riscv32    - 32-bit RISC-V
    riscv64    - 64-bit RISC-V
    thumb      - Thumb
    thumbeb    - Thumb (big endian)
    wasm32     - WebAssembly 32-bit
    wasm64     - WebAssembly 64-bit
    x86        - 32-bit X86: Pentium-Pro and above
    x86-64     - 64-bit X86: EM64T and AMD64