Implement Error Handling Framework

## Background
For Version 0.1.0 InDev of Tessitura, we need a consistent error handling framework that will provide clear, actionable error information to users and developers. This framework will establish patterns for error creation, propagation, and reporting across all modules.

## Description
Create a comprehensive error handling framework that defines custom error types for different failure scenarios, implements proper error propagation mechanisms, and ensures meaningful error messages are provided to the user. This framework should follow Rust idioms for error handling while making debugging and troubleshooting straightforward.

## Requirements
- Define a custom error enum that covers all potential error categories:
- File system errors (permission denied, not found, etc.)
- Parser errors
- Configuration errors
- Input validation errors
- Runtime errors
- Implement the `std::error::Error` trait for all custom error types
- Create a consistent pattern for error propagation using the `?` operator
- Include context in error messages (file paths, input values, etc.)
- Support conversion from standard library errors (`std::io::Error`, etc.)
- Provide mechanisms for adding context to errors as they propagate up the call stack
- Ensure errors include sufficient information for both users and developers

## Technical Notes
- Consider using the `thiserror` crate for deriving error implementations
- Implement `Display` trait for human-readable error messages
- Consider implementing separate error types per module with a top-level aggregating error
- Use enums to represent different error variants within a category
- Include file/line information for internal errors when appropriate
- Consider different output formats based on execution context (CLI vs. library use)
- Implement `From` traits for conversion between error types

## Acceptance Criteria
- All potential error conditions in the application are represented by custom error types
- Error messages are clear, specific, and actionable for end users
- Errors include sufficient context for debugging (file paths, specific operations, etc.)
- Consistent error propagation patterns are used throughout the codebase
- Standard library errors are properly wrapped with additional context
- Errors can be easily matched and handled at appropriate levels
- Documentation explains the error handling patterns and how to extend them
- Unit tests verify error creation, propagation, and context preservation

## Estimated Effort
Medium (2-3 days)