feat: ability to delete a project

[matous-volf]

Summary by CodeRabbit

• New Features

  • Introduced functionality to delete projects within the Project Form component.
  • Added a button to trigger project deletion, enhancing project management capabilities.

• Bug Fixes

  • Improved error handling by enabling automatic conversion of database-related errors to application-specific error types.

• Documentation

  • Updated error handling documentation to reflect new implementations and improvements for better clarity.

• Style

  • Enhanced code readability by adopting the use of Self for type references in error handling implementations.

• Chores

  • Modified foreign key constraint behavior in the tasks table to improve data integrity when projects are deleted.

[coderabbitai[bot]]

Walkthrough

The changes introduce a new feature for deleting projects within the ProjectForm component, enhancing its existing capabilities for creating and editing projects. An asynchronous delete_project function has been implemented in the server module, and error handling has been updated across various error modules. Additionally, the layout of the ProjectForm has been adjusted for improved button alignment, and handling of optional project references has been refined.

Changes

File	Change Summary
src/components/project_form.rs	Added functionality for deleting a project, including a new button and control flow modifications. Updated import statements and adjusted button layout. Improved handling of optional project references.
src/errors/error.rs	Introduced From trait implementation for converting diesel::result::Error to a custom Error type. Modified Display and FromStr implementations to use Self for improved readability.
src/errors/project_error.rs	Updated From and FromStr implementations to use Self instead of explicit type references, enhancing code clarity.
src/errors/task_error.rs	Modified From and FromStr implementations to use Self for type references, improving readability and consistency.
src/server/projects.rs	Added a new asynchronous function delete_project to handle project deletion by project_id, including error handling for database operations.
migrations/2024-08-19-105140_create_tasks/up.sql	Modified foreign key constraint on project_id in the tasks table to include ON DELETE SET NULL, preventing loss of task records when a project is deleted.

Possibly related PRs

• #32: This PR relates to the BottomPanel component's enhancements for task editing, sharing a context of form modifications.
• #35: Updates in the TaskList component for task completion are relevant due to their involvement with asynchronous operations, similar to the new delete functionality in the ProjectForm.

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