feat: integrate custom features for smart context management

- Added a new integration script to manage custom features related to smart context.
- Implemented handlers for smart context operations (get, update, clear, stats) in ipc.
- Created a SmartContextStore class to manage context snippets and summaries.
- Developed hooks for React to interact with smart context (useSmartContext, useUpdateSmartContext, useClearSmartContext, useSmartContextStats).
- Included backup and restore functionality in the integration script.
- Validated integration by checking for custom modifications and file existence.

backups/backup-20251218-094212/git-status.txt

@@ -0,0 +1,20 @@
+On branch main
+Your branch is up to date with 'origin/main'.
+
+Changes not staged for commit:
+  (use "git add/rm <file>..." to update what will be committed)
+  (use "git restore <file>..." to discard changes in working directory)
+	deleted:    dyad-backup-20251218-085122/commit-history.txt
+	deleted:    dyad-backup-20251218-085122/custom/hooks/useSmartContext.ts
+	deleted:    dyad-backup-20251218-085122/custom/index.ts
+	deleted:    dyad-backup-20251218-085122/custom/ipc/smart_context_handlers.ts
+	deleted:    dyad-backup-20251218-085122/custom/utils/smart_context_store.ts
+	deleted:    dyad-backup-20251218-085122/last-changes.diff
+
+Untracked files:
+  (use "git add <file>..." to include in what will be committed)
+	backups/
+	dyad-remove-limit-doc/
+	scripts/integrate-custom-features.sh
+
+no changes added to commit (use "git add" and/or "git commit -a")