fix: allow ampersands in filenames while blocking command injection (v1.1.2)

Fixes #2 - Files with & in their names (e.g., 'Research & Development.md')
were being incorrectly sanitized, causing search and file-not-found errors.

Changes:
- Removed & from DANGEROUS_CHARS regex
- Single & is safe in quoted arguments passed to CLI
- Dangerous && patterns still blocked by COMMAND_INJECTION_PATTERNS
- Also allows (), [], {} which are safe in quoted args

Version: 1.1.2

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": "0.3",
   "name": "obsidian-mcp",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "display_name": "Obsidian CLI Bundle",
   "description": "MCP Bundle for Obsidian CLI - Enable AI assistants to manage Obsidian vaults through conversational interface",
   "long_description": "This MCP bundle provides a comprehensive set of tools for AI assistants to interact with and manage Obsidian vaults. It includes capabilities for creating, reading, updating, and deleting notes, managing links and tags, handling tasks, and more. With this bundle, AI assistants can seamlessly integrate with Obsidian to help users organize their knowledge and workflows.",