Release v2.1.1: Fix EPERM cross-platform error (#183)

* fix: resolve cross-platform EPERM permissions errors

modManager.js:
- Switch from hardcoded 'junction' to dynamic symlink type based on OS (fixing Linux EPERM).
- Add retry logic for directory removal to handle file locking race conditions.
- Improve broken symlink detection during profile sync.

gameManager.js:
- Implement retry loop (3 attempts) for game directory removal in updateGameFiles to prevent EBUSY/EPERM errors on Windows.

paths.js:
- Prevent fs.mkdirSync failure in getModsPath by pre-checking for broken symbolic links.

* fix: missing pacman builds

* prepare release for 2.1.1

minor fix for EPERM error permission

* Update README.md Windows Prequisites for ARM64 builds

* fix: remove broken symlink after detected

* fix: add pathexists for paths.js to check symlink

* fix: isbrokenlink should be true to remove the symlink

backend/core/paths.js

@@ -179,8 +179,28 @@ async function getModsPath(customInstallPath = null) {
     const profilesPath = path.join(userDataPath, 'Profiles');
 
     if (!fs.existsSync(modsPath)) {
-      // Ensure the Mods directory exists
-      fs.mkdirSync(modsPath, { recursive: true });
+      // Check for broken symlink to avoid EEXIST/EPERM on mkdir
+      let isBrokenLink = false;
+      let pathExists = false;
+      try {
+          const stats = fs.lstatSync(modsPath);
+          pathExists = true;
+          if (stats.isSymbolicLink()) {
+              // Check if target exists
+              try {
+                  fs.statSync(modsPath);
+              } catch {
+                  isBrokenLink = true;
+              }
+          }
+      } catch (e) { /* path doesn't exist at all */ }
+
+      if (isBrokenLink) {
+        fs.unlinkSync(modsPath); // Remove broken symlink
+      }
+      if (!pathExists || isBrokenLink) {
+        fs.mkdirSync(modsPath, { recursive: true });
+      }
     }
     if (!fs.existsSync(disabledModsPath)) {
       fs.mkdirSync(disabledModsPath, { recursive: true });