Update Todoist integration to include overdue tasks and color them red

[Copilot]

• Update Todoist API filter to include overdue tasks (filter=today|overdue)
• Update test to reflect the new URL filter
• Run tests to ensure changes work correctly
• Verify code formatting with go fmt and go vet
• Add red coloring for overdue tasks using [red] tags
• Update test data to include due dates for proper testing
• Revert unintended formatting changes to gitstatus_test.go
• Update README.md to mark todoist integration task as complete

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update todoist integration to include tasks that are overdue</issue_title>
<issue_description>## Problem
Currently when using the todoist integration for the todo list box it will only display tasks that are due on the current day and exclude any tasks that are considered overdue.

Solution

Update the integration to pull both tasks due on the current day and any tasks that are considered overdue.

https://api.todoist.com/rest/v2/tasks?filter=today%7Coverdue</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #12

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[DMcP89]

@copilot update it so that the text for overdue tasks in colored red.

[Copilot]

@copilot update it so that the text for overdue tasks in colored red.

Done! Overdue tasks are now colored red in the UI. The implementation compares each task's due date with today's date - tasks with due dates before today are displayed with [red] tags.

Changes in commit ff7a7ad:

• Updated GetTodaysTasks() to check if task is overdue by comparing due date
• Overdue tasks formatted as [red]☐ Task name[white]
• Tasks due today or in the future remain in normal white color
• Updated test data to include due field with dates for testing

Example output:

☐ Day care pick up         (due today - normal)
☐ Garbage                  (🔴 overdue - RED)
☐ Work on harambot         (🔴 overdue - RED)

[DMcP89]

@copilot remove the changes you made to gitstatus_test.go and update README.md to mark this task as checked.

[Copilot]

@copilot remove the changes you made to gitstatus_test.go and update README.md to mark this task as checked.

Done in commit 8b5e3c7:

• Reverted changes to gitstatus_test.go (removed whitespace cleanup that was accidentally included)
• Updated README.md line 74 to mark "Update todoist integration to include overdue tasks" as completed [x]