Backport System.IO.Compression.ZipFile docs

[carlossanlop]

Blocked by dotnet/dotnet-api-docs#5363 which moves lengthy remarks to their own md files so they don't get backported.

Backporting public API documentation from MS Docs into triple slash comments for the System.IO.Compression.ZipFile assembly.

The full description of the purpose of this PR is described in the issue #44969 - Pilot a new process that extracts API documentation from source code under the section "Bring documentation from Docs to triple slash".

I ran the porting tool using this command:

DocsPortingTool.exe \
-CsProj D:\runtime\src\libraries\System.IO.Compression.ZipFile\src\System.IO.Compression.ZipFile.csproj \
-Docs D:\dotnet-api-docs\xml \
-Direction ToTripleSlash \
-IncludedAssemblies System.IO.Compression \
-IncludedNamespaces System.IO.Compression

Please compare the ported docs with their source files in dotnet-api-docs:

• https://github.com/dotnet/dotnet-api-docs/tree/master/xml/System.IO.Compression/ZipFile.xml
• https://github.com/dotnet/dotnet-api-docs/tree/master/xml/System.IO.Compression/ZipFileExtensions.xml

[jeffhandley]

LGTM when unblocked

[adamsitnik]

LGTM, thank you @carlossanlop

[adamsitnik]

Why do we have a separate copy of the xml docs for every .cs file that belongs to the same partial class? What if someone edits just one of them?

/// <summary>true</summary>
public partial class Sample { }

/// <summary>false</summary>
public partial class Sample { }

[jeffhandley]

@carlossanlop Is this unblocked now?

[ghost]

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