Add thread safety to XML docs.

Author: SvenGroot

src/Ookii.AnswerFile/AutoLogonOptions.cs

@@ -5,6 +5,7 @@ namespace Ookii.AnswerFile;
 /// <summary>
 /// Provides options for logging on automatically.
 /// </summary>
+/// <threadsafety instance="false" static="true"/>
 public class AutoLogonOptions
 {
     /// <summary>

src/Ookii.AnswerFile/CleanBiosOptions.cs

@@ -15,6 +15,7 @@
 ///   disk. Windows will be installed on the second partition.
 /// </para>
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public class CleanBiosOptions : CleanOptionsBase
 {
     /// <summary>

src/Ookii.AnswerFile/CleanEfiOptions.cs

@@ -17,6 +17,7 @@ namespace Ookii.AnswerFile;
 ///   remaining size of the disk. Windows will be installed on the third partition.
 /// </para>
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public class CleanEfiOptions : CleanOptionsBase
 {
     /// <summary>

src/Ookii.AnswerFile/DomainCredential.cs

@@ -9,6 +9,7 @@
 ///   at best. Do not store generated files with sensitive passwords in public locations.
 /// </note>
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public record class DomainCredential
 {
     /// <summary>

src/Ookii.AnswerFile/DomainOptions.cs

@@ -10,6 +10,7 @@ namespace Ookii.AnswerFile;
 ///   The password of the account used to join the domain is stored in plain text.
 /// </note>
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public class DomainOptions
 {
     private Collection<string>? _domainAccounts;

src/Ookii.AnswerFile/DomainUser.cs

@@ -5,6 +5,7 @@ namespace Ookii.AnswerFile;
 /// <summary>
 /// Represents a domain or local user.
 /// </summary>
+/// <threadsafety instance="false" static="true"/>
 public record class DomainUser
 {
     /// <summary>

src/Ookii.AnswerFile/ExistingPartitionOptions.cs

@@ -14,6 +14,7 @@
 ///   Depending on the system type, a system or EFI partition must already exist.
 /// </para>
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public class ExistingPartitionOptions : TargetedInstallOptionsBase
 {
     /// <summary>

src/Ookii.AnswerFile/Generator.cs

@@ -10,6 +10,7 @@ namespace Ookii.AnswerFile;
 /// A generator for Windows unattended installation files.
 /// </summary>
 /// <seealso cref="GeneratorOptions"/>
+/// <threadsafety instance="false" static="true"/>
 public class Generator
 {
     internal const string PublicKeyToken = "31bf3856ad364e35";

src/Ookii.AnswerFile/GeneratorOptions.cs

@@ -7,6 +7,7 @@ namespace Ookii.AnswerFile;
 /// Provides options for generating an unattended Windows installation answer file.
 /// </summary>
 /// <seealso cref="Generator"/>
+/// <threadsafety instance="false" static="true"/>
 public class GeneratorOptions
 {
     private Collection<LocalCredential>? _localAccounts;

src/Ookii.AnswerFile/InstallOptionsBase.cs

@@ -5,6 +5,7 @@ namespace Ookii.AnswerFile;
 /// <summary>
 /// A base class for all the various installation options classes.
 /// </summary>
+/// <threadsafety instance="false" static="true"/>
 [JsonDerivedType(typeof(CleanEfiOptions), typeDiscriminator: "CleanEfi")]
 [JsonDerivedType(typeof(CleanBiosOptions), typeDiscriminator: "CleanBios")]
 [JsonDerivedType(typeof(ExistingPartitionOptions), typeDiscriminator: "ExistingPartition")]

src/Ookii.AnswerFile/LocalCredential.cs

@@ -9,6 +9,7 @@
 ///   at best. Do not store generated files with sensitive passwords in public locations.
 /// </note>
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public record class LocalCredential
 {
     /// <summary>

src/Ookii.AnswerFile/ManualInstallOptions.cs

@@ -6,6 +6,7 @@
 /// <remarks>
 /// When using this installation method, the installation is not fully unattended.
 /// </remarks>
+/// <threadsafety instance="false" static="true"/>
 public class ManualInstallOptions : InstallOptionsBase
 {
     /// <summary>

src/Ookii.AnswerFile/OptionalFeatures.cs

@@ -5,6 +5,7 @@ namespace Ookii.AnswerFile;
 /// <summary>
 /// Provides options for installing optional features.
 /// </summary>
+/// <threadsafety instance="false" static="true"/>
 public class OptionalFeatures
 {
     private Collection<string>? _features;

src/Ookii.AnswerFile/Partition.cs

@@ -6,6 +6,7 @@ namespace Ookii.AnswerFile;
 /// Specifies a partition to be created when using the <see cref="CleanBiosOptions"/> or
 /// <see cref="CleanEfiOptions"/> class.
 /// </summary>
+/// <threadsafety instance="false" static="true"/>
 public class Partition : ISpanParsable<Partition>
 {
     /// <summary>

src/Ookii.AnswerFile/TargetedInstallOptionsBase.cs

@@ -3,6 +3,7 @@
 /// <summary>
 /// Base class for all install options that target a specific disk and partition.
 /// </summary>
+/// <threadsafety instance="false" static="true"/>
 public abstract class TargetedInstallOptionsBase : InstallOptionsBase
 {
     /// <summary>