doc: Update Windows build instructions

[inkydragon]

I tried to build lfortran in WSL2 and for the most part it went well.
There are a few places in the documentation that need to be updated.

• In addition to zlib, you need zstd, otherwise cmake will complain that it can't find the dependencies.
  Maybe this could be added to conda's environment configuration as well? Just like:
  

  lfortran/ci/environment.yml

  Line 22 in 60dac40

  - zstd-static=1.5.5

• lfortran now generates an executable with the same name as the source file

• Do we need to add -DWITH_RUNTIME_STACKTRACE=yes to the default cmake flags?
  Otherwise ./run_tests.py will throw an error when executing runtime_stacktrace_01.f90 * run_dbg
  Or skip the related tests if the WITH_RUNTIME_STACKTRACE flag is not set
  

  lfortran/doc/src/installation.md

  Line 201 in 60dac40

  cmake -DCMAKE_BUILD_TYPE=Debug -DWITH_LLVM=yes -DCMAKE_INSTALL_PREFIX=`pwd`/inst .\

[inkydragon]

Random Thoughts: If only the documentation was changed, it might be possible to skip all code-related CIs.

on:
  push:
    paths-ignore:
      - 'doc/**'

paths-ignore

[certik]

Thanks, that looks good.