chore: Bump version to 0.1.2

Updated all version references from 0.1.1 to 0.1.2:
- Workspace version in llmx-rs/Cargo.toml
- Package version in llmx-cli/package.json
- Updated Cargo.lock with all workspace crate versions
- Updated test hardcoded version strings in:
  - mcp-server/tests/common/mcp_process.rs
  - app-server/tests/suite/user_agent.rs
  - app-server/tests/common/mcp_process.rs
- Updated TUI snapshot tests with new version number

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

llmx-cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@valknarthing/llmx",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "license": "Apache-2.0",
   "description": "LLMX CLI - Multi-provider coding agent powered by LiteLLM",
   "bin": {