feat: Add search history extraction (Get-SearchHistory.ps1)

Extract Windows Search queries, typed paths, and Run dialog history
from registry (WordWheelQuery, TypedPaths, RunMRU).

Includes warnings about Windows 11 limitations - modern search without
Microsoft account doesn't persist history due to cloud-first design.

Update TODO.md.

TODO.md

@@ -25,7 +25,7 @@
 ### Browser & Search History
 - [ ] Browser history - Edge, Chrome, Firefox artifacts
 - [x] Typed URLs - URLs manually typed in browsers
-- [ ] Search terms - Windows Search history
+- [x] Search terms - Windows Search history (Get-SearchHistory.ps1)
 
 ### File Access
 - [ ] LNK files - Shortcut files showing file access
@@ -33,11 +33,11 @@
 - [ ] Shell Bags - Folder access history
 
 ### System Information
-- [ ] Computer name - System identification
-- [ ] Timezone - System timezone settings
-- [ ] Last shutdown time
+- [x] Computer name - System identification (Get-Info.ps1, winfetch.ps1)
+- [x] Timezone - System timezone settings (Get-Info.ps1)
+- [x] Last shutdown time (Get-Info.ps1 - shows Last Boot)
 - [ ] Installed programs - Software inventory
-- [ ] System uptime history
+- [x] System uptime history (Get-Info.ps1, winfetch.ps1)
 
 ### Persistence Mechanisms
 - [ ] Run/RunOnce keys - Programs that auto-start