Create nsis installer script

[IsaacPD]

Related: #5089

Description
Adds a basic nsis installer script that can be run by:

1. Install makensis
   1. linux apt-get install -y nsis nsis-doc nsis-pluginapi
   2. mac brew install makensis
   3. windows https://nsis.sourceforge.io/Download
2. Download https://nsis.sourceforge.io/EnVar_plug-in and unzip in the nsis install directory on whatever platform you are on

   unzip EnVar_plugin.zip -d /usr/local/share/nsis/ 

3. compile the windows binary make ./out/skaffold-windows-amd64.exe
4. Copy the binary and whatever other files to include in the installation in the installer out directory

   mkdir installers/windows/out && cp ./out/skaffold-windows-amd64.exe installers/windows/out

5. Set skaffold version and run makensis SKAFFOLD_VERSION=1.18.0.0 makensis -V4 skaffold.nsi
   1. skaffold version must be of the form X.X.X.X in order to be accepted by makensis

The installer can:

• Install to a user specified directory
• Add that directory to the user's PATH
• Create an uninstaller for that uninstalls skaffold and removes the install directory from the user's PATH

Follow-up Work
Add a step in the release process to publish the installer alongside all the other binaries. Phase out chocolatey from use

[codecov]

Codecov Report

Merging #5233 (6499fcb) into master (35214eb) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5233      +/-   ##
==========================================
+ Coverage   71.82%   71.85%   +0.02%     
==========================================
  Files         387      388       +1     
  Lines       13928    14036     +108     
==========================================
+ Hits        10004    10085      +81     
- Misses       3190     3206      +16     
- Partials      734      745      +11     

Impacted Files	Coverage Δ
pkg/skaffold/yaml/yaml.go	54.83% <0.00%> (-8.13%)	⬇️
pkg/skaffold/runner/build_deploy.go	68.88% <0.00%> (-1.01%)	⬇️
pkg/skaffold/util/util.go	83.19% <0.00%> (-0.15%)	⬇️
pkg/skaffold/docker/docker_init.go	100.00% <0.00%> (ø)
pkg/skaffold/initializer/build/util.go	100.00% <0.00%> (ø)
pkg/skaffold/trigger/fsnotify/trigger.go	71.05% <0.00%> (ø)
pkg/skaffold/initializer/build/builders.go	70.00% <0.00%> (ø)
pkg/skaffold/initializer/analyze/builder.go	100.00% <0.00%> (ø)
pkg/skaffold/trigger/fsnotify/workdir.go
pkg/skaffold/tags/paths.go	65.00% <0.00%> (ø)
... and 4 more

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[MarlonGamez]

QQ: Should it be installer/windows/ or installers/windows/ ? The PR description uses the the former but the added file path is the latter

[IsaacPD]

QQ: Should it be installer/windows/ or installers/windows/ ? The PR description uses the the former but the added file path is the latter

Oops it should be installers/windows/ as installers is what currently exists in the repo

[MarlonGamez]

LGTM!