[client] fix Windows's shortcut & uninstaller icon don't display; ignore installer files (.exe/pkg/deb) from Git

[nvbien2000]

Describe your changes

• I create a Windows installer file .exe. After I installed it, the shortcut and uninstaller icon is empty. The "uninstaller icon is empty" issue exists on NetBird production v0.5.61 also.
• This change aims to fix above issue.
• I also ignore .exe, .pkg, .deb from Git.

Example:

Issue ticket number and link

• None

Stack

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)

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Documentation

Select exactly one:

• I added/updated documentation for this change
• Documentation is not needed for this change (small fix, no need documentation)

Docs PR URL (required if "docs added" is checked)

Paste the PR link from https://github.com/netbirdio/docs here:

https://github.com/netbirdio/docs/pull/__

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[CLAassistant]

All committers have signed the CLA.

[mlsmaycon]

@nvbien2000 thanks for the contribution.

I just want to check if you validated the shortcut icon using a syso file as in the following workflow:

https://github.com/netbirdio/netbird/blob/main/.github/workflows/release.yml#L80

[nvbien2000]

@mlsmaycon Hello Maycon. I haven't used that syso working flow. All I did is just running this command makensis -V4 client/installer.nsis in Contributing.md guideline.