Add Linux support and switch to official AmxModX github release URL for auto compiler download.

[ibrahim-rouis]

This pull request updates the way the AMX Mod X compiler is downloaded and extracted from official release page for both Linux and Windows users.

Tested and it work for both Linux and Windows.

Note: Linux users have to install 32bit support for their distro because the amxxpc compiler is 32bit.

[ibrahim-rouis]

Since you are downloading a file that contains binary executables. I have added file integrity check using SHA256 algorithm.

Downloading from official source and verifying integrity will help your extension getting approved into Visual Studio marketplace.

[NiceFeatures]

Great job on this! Moving the compiler download to the official releases and adding the SHA256 integrity checks is a significant improvement. I've verified the hashes, and they match the files exactly.

However, I found a couple of issues in the extractZip function (within CP.exec) that will cause the process to fail in certain environments:

1. Bash Wildcard Expansion Bug (Linux)
   In the cleanup command, you're using rm -rf "${destDir}/*.sma". In Bash, the wildcard * inside double quotes is treated as a literal character, so it won't expand. It will try to delete a file literally named .sma instead of all files with that extension. Fix: Move the wildcard outside of the quotes: rm -rf "${destDir}"/.sma

2. PowerShell Escape Issue (Windows)
   In the Windows command, you're wrapping ${destDir} with single quotes ('${destDir}'). If a user's Windows path contains a single quote (e.g., C:\Users\John's PC...), the PowerShell command will break. You should escape single quotes by replacing them with two single quotes (''), which is the standard PowerShell escaping rule.

Suggested Fix
Here is a corrected version of the extractZip function that addresses both issues:

function extractZip(zipPath: string, destDir: string): Promise<void> {
    return new Promise((resolve, reject) => {
        // Escape single quotes for PowerShell (replace ' with '')
        const psDestDir = destDir.replace(/'/g, "''");
        const psZipPath = zipPath.replace(/'/g, "''");
        const cmd = process.platform === 'win32'
            ? `powershell -NoProfile -Command "Expand-Archive -Path '${psZipPath}' -DestinationPath '${psDestDir}' -Force; Copy-Item -Path '${psDestDir}\\addons\\amxmodx\\scripting\\*' -Destination '${psDestDir}' -Recurse -Force; Remove-Item -Path '${psDestDir}\\addons', '${psDestDir}\\testsuite', '${psDestDir}\\*.sma' -Recurse -Force"`
            : `tar -xzf "${zipPath}" --strip-components=3 -C "${destDir}" addons/amxmodx/scripting && rm -rf "${destDir}"/*.sma "${destDir}/testsuite"`;
            
        CP.exec(cmd, (error) => {
            if (error) reject(error);
            else resolve();
        });
    });
}

Once these small adjustments are made, this PR will be ready to merge!

[ibrahim-rouis]

Fixed. Thanks for the tips!