Re-factor the build script to distinguish each step

[DRSDavidSoft]

This PR addresses #2757

Description

• Added a -noVendor switch to bypass downloading vendor packages
• Only check for msbuild.exe in path when the -Compile switch is used

👉 Note: The order of build has changed. Previously, the vendor packages were downloaded first, and then the launcher was subsequently built.

Since the launcher doesn't depend on vendored packages, and it might fail first, this PR moves the build step before downloading files, so if it fails the vendored files aren't downloaded and discarded.

[DRSDavidSoft]

@daxgames Please have a look, thanks!

📦 Download from GitHub Actions: https://github.com/cmderdev/cmder/actions/runs/3259741744

[daxgames]

@DRSDavidSoft are you adding Github gh as a Cmder component? If so I like it.

[DRSDavidSoft]

@DRSDavidSoft are you adding Github gh as a Cmder component? If so I like it.

That's also a good idea, but those functions are for the GitHub Actions / CI. I think gh could also be useful since it's only ~8 MB, but not the focus of this PR.

[daxgames]

I could see adding gh to the %CMDER_ROOT%/vendor/bin folder so it is automatically in the path. At this point it is easy enough to add after by a user that wants it.

[daxgames]

Odd it downloads from Github actions as Cmder.zip.zip and it is a zip in a zip.

[DRSDavidSoft]

@daxgames Sad to say, this is a known limitation by the authors (https://github.com/actions/upload-artifact#zipped-artifact-downloads). I haven't found anything yet to overcome this