Resolves build errors with test frameworks (XCTest, Testing) that
require macOS 14.0+. This fixes the following linker warnings:
- Building for macOS-13.0 but linking with XCTest built for 14.0
- Building for macOS-13.0 but linking with libXCTestSwiftSupport built for 14.0
- Building for macOS-13.0 but linking with Testing framework built for 14.0

- Updated 80+ instances of onChange(of:perform:) to use the new
 macOS 14.0+ syntax with two-parameter closures (_, newValue in)
- Commented out unreachable code in LSPService.swift after early return
- Updated Xcode project settings to version 16.1 (LastUpgradeCheck: 2610)
- Enabled app sandbox and JIT runtime exceptions for proper execution
- Added string catalog symbol generation
This resolves all deprecation warnings when targeting macOS 14.0+.
Files affected: 39 files
Changes: 95 insertions(+), 76 deletions(-)

- Fixed remaining onChange(of:perform:) calls that used explicit 'perform:' label
- Updated onChange calls with capture lists to use new two-parameter syntax
- Simplified capture list patterns as new onChange provides both old and new values
Files fixed:
- WorkspacePanelTabBar.swift
- EditorTabButtonStyle.swift
- EditorTabs.swift (2 instances)
- ExtensionsListView.swift
All onChange deprecation warnings now resolved.

The app was crashing with REPORT_APP_ENTITLEMENTS_INSUFFICIENT when
trying to open file/folder dialogs from the Welcome screen.
Added necessary entitlements:
- com.apple.security.app-sandbox: Enable App Sandbox
- com.apple.security.files.user-selected.read-write: Allow user-selected file access
- com.apple.security.files.bookmarks.app-scope: Allow bookmark persistence
- com.apple.security.network.client: Enable network access for extensions/LSP
This resolves the crash when clicking "Open File or Folder" button.

Fixed memory leak where an UnsafeMutablePointer<passwd> was allocated
but never deallocated.
Issue Analysis:
- Line 43 was allocating heap memory for `result` pointer
- getpwuid_r() immediately overwrites `result` to point to `pwd` (stack)
- The allocated heap memory was leaked on every call
- Attempting to deallocate crashed because `result` pointed to stack memory
Root Cause:
The allocation was unnecessary. getpwuid_r() expects `result` as an
output parameter - it sets the pointer itself, no pre-allocation needed.
Solution:
Removed the unnecessary .allocate(capacity: 1) call. Now `result` is
initialized as nil and getpwuid_r() sets it to point to `pwd` on success.
This function is called every time a terminal is opened, so the leak
would accumulate with each terminal session.