Add Pi Research Agent package

Autonomous research agent with web search, source analysis, and report synthesis.
Built on Pi agent core. Available as CLI, programmatic API, and MCP server.

Features:
- 4 built-in tools: web_search, read_url, save_note, synthesize_report
- CLI with TUI and print modes
- Programmatic API via ResearchAgent class
- MCP server with 3 tools: research, quick_search, read_url
- Skills system for custom research behavior
- Automatic .env file loading for API keys
- Configurable max turns, output formats (markdown/JSON/bullet)
- Automatic report saving to research-output/

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,26 @@
+---
+name: Feature Request
+description: Suggest a new feature for Pi Research Agent
+title: "[Feature]: "
+labels: enhancement
+---
+
+## Description
+
+A clear and concise description of the feature you'd like to see.
+
+## Use Case
+
+Describe the problem this feature would solve.
+
+## Proposed Solution
+
+How would you like this feature to work?
+
+## Alternatives
+
+Any alternative solutions or features you've considered.
+
+## Additional Context
+
+Any other relevant information, screenshots, or examples.