LT-21752: Add Send/Receive data option to backup/restore

[jasonleenaylor]

Summary

• Adds a new "Send/Receive data" checkbox to the Backup and Restore dialogs, allowing users to include .hg (Mercurial) directories and OtherRepositories/ folders in backups
• The backup checkbox is checked by default when S/R data exists in the project; the restore checkbox is informational-only (disabled) reflecting what the backup contains
• Updates RestoreProjectPresenter.IsOkayToRestoreProject() to allow restoring over S/R projects when the backup includes S/R data
• Fixes Manage-LocalLibraries.ps1: uses XmlWriter with tab-indented settings instead of XmlDocument.Save() to preserve SilVersions.props formatting; makes -Library ValidateSet names (lcm, palaso) consistent with pack-mode switch names (-Lcm, -Palaso)

Companion PR

The liblcm side of this feature (interface, settings, serialization, backup/restore service changes, and tests) has already been merged: the IBackupInfo.IncludeSendReceiveData property, BackupFileSettings serialization, ProjectBackupService file gathering, ProjectRestoreService extraction, and RestoreProjectSettings command-line option.

Test plan

• New unit tests in RestoreProjectPresenterTests.cs (3 tests for IncludesFiles with S/R flag variations)
• Verify backup dialog shows S/R checkbox, enabled and checked when .hg exists in project
• Verify backup zip contains .hg/ and OtherRepositories/ entries when checked
• Verify restore dialog shows S/R checkbox as disabled/informational, reflecting backup contents
• Verify restoring over an S/R project is allowed when backup includes S/R data
• Verify Manage-LocalLibraries.ps1 -Library lcm -Version X works (previously required -Library liblcm)
• Verify SilVersions.props retains tab indentation after running Manage-LocalLibraries.ps1

Note: Build/SilVersions.props contains a temporary local version (11.0.0-chore-updateperm0157) used during integration testing. This should be reverted to the upstream version before merge.

🤖 Generated with Claude Code

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NUnit Tests

    1 files  ±0      1 suites  ±0   12m 22s ⏱️ + 1m 20s
4 207 tests +2  4 137 ✅ +3  70 💤  - 1  0 ❌ ±0 
4 216 runs  +2  4 146 ✅ +3  70 💤  - 1  0 ❌ ±0 

Results for commit 3bc4f51. ± Comparison against base commit 9345700.

This pull request removes 1 and adds 3 tests. Note that renamed tests count towards both.

SIL.FieldWorks.FwCoreDlgs.RestoreProjectPresenterTests ‑ ObsoletePresenterApi_Disabled

SIL.FieldWorks.FwCoreDlgs.RestoreProjectPresenterTests ‑ IncludesFiles_AllFlags_CorrectCombination
SIL.FieldWorks.FwCoreDlgs.RestoreProjectPresenterTests ‑ IncludesFiles_WithSendReceiveData_ShowsInLabel
SIL.FieldWorks.FwCoreDlgs.RestoreProjectPresenterTests ‑ IncludesFiles_WithoutSendReceiveData_OmitsFromLabel