feat: Claude Code slash commands for Task Master (#774)

* Fix Cursor deeplink installation with copy-paste instructions (#723)

* fix: expand-task (#755)

* docs: Update o3 model price (#751)

* docs: Auto-update and format models.md

* docs: Auto-update and format models.md

* feat: Add Claude Code task master commands

Adds Task Master slash commands for Claude Code under /project:tm/ namespace

---------

Co-authored-by: Joe Danziger <joe@ticc.net>
Co-authored-by: Ralph Khreish <35776126+Crunchyman-ralph@users.noreply.github.com>
Co-authored-by: Volodymyr Zahorniak <7808206+zahorniak@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: neno-is-ooo <204701868+neno-is-ooo@users.noreply.github.com>

.claude/commands/tm/models/setup.md

@@ -0,0 +1,51 @@
+Run interactive setup to configure AI models.
+
+## Interactive Model Configuration
+
+Guides you through setting up AI providers for Task Master.
+
+## Execution
+
+```bash
+task-master models --setup
+```
+
+## Setup Process
+
+1. **Environment Check**
+   - Detect existing API keys
+   - Show current configuration
+   - Identify missing providers
+
+2. **Provider Selection**
+   - Choose main provider (required)
+   - Select research provider (recommended)
+   - Configure fallback (optional)
+
+3. **API Key Configuration**
+   - Prompt for missing keys
+   - Validate key format
+   - Test connectivity
+   - Save configuration
+
+## Smart Recommendations
+
+Based on your needs:
+- **For best results**: Claude + Perplexity
+- **Budget conscious**: GPT-3.5 + Perplexity
+- **Maximum capability**: GPT-4 + Perplexity + Claude fallback
+
+## Configuration Storage
+
+Keys can be stored in:
+1. Environment variables (recommended)
+2. `.env` file in project
+3. Global `.taskmaster/config`
+
+## Post-Setup
+
+After configuration:
+- Test each provider
+- Show usage examples
+- Suggest next steps
+- Verify parse-prd works