Add addp command for adding tasks with priority

[rosconap]

Adding addp to insert new tasks with priority.

• Implement addp PRIORITY "TASK" syntax to add tasks with specified priority (A-Z)
• Priority is automatically converted to uppercase and formatted as (PRIORITY)
• Add comprehensive error handling for invalid priorities (numbers, special chars, multiple chars)
• Integrate with existing features like TODOTXT_DATE_ON_ADD and configuration options
• Update help documentation in shorthelp() and actionsHelp()
• Add complete documentation to USAGE.md with examples and usage patterns
• Add comprehensive test suite (t1050-addp.sh) with 23 test cases covering:
  • Basic functionality and priority validation
  • Case conversion (lowercase to uppercase)
  • Integration with projects and contexts
  • Error handling for all invalid input scenarios
  • Configuration integration (date on add, priority on add overrides)
  • Edge cases with special characters and quotes

Example usage:

  todo.sh addp A "High priority task"     # Creates: (A) High priority task
  todo.sh addp c "Medium priority task"   # Creates: (C) Medium priority task

Before submitting a pull request, please make sure the following is done:

• Fork the repository and create your branch from master.
• If you've added code that should be tested, add tests!
• Ensure the test suite passes.
• Lint your code with ShellCheck.
• Include a human-readable description of what the pull request is trying to accomplish.
• Steps for the reviewer(s) on how they can manually QA the changes.
• Have a fixes #XX reference to the issue that this pull request fixes.

[inkarkat]

This is a common add-on (here's mine), might as well be included in the core.

[rosconap]

Updated with ecae92f to address @inkarkat 's feedback. Shamefully i did not check out the add-on feature yet.

[inkarkat]

Looks good! I'd only use the example task text from add, not from addto. The TEXT TO ADD isn't very specific (as it's not necessarily a new task when adding to done.txt).

[inkarkat]

Suggested change

	addpri|ap PRIORITY "TEXT TO ADD"
	addpri|ap PRIORITY "THING I NEED TO DO +project @context"

[inkarkat]

Suggested change

	addpri PRIORITY "TEXT TO ADD"
	ap PRIORITY "TEXT TO ADD"
	Adds TEXT TO ADD to your todo.txt file on its own line with
	addpri PRIORITY "THING I NEED TO DO +project @context"
	ap PRIORITY "THING I NEED TO DO +project @context"
	Adds THING I NEED TO DO to your todo.txt file on its own line with

[Copilot]

Pull Request Overview

This PR adds a new addpri command that allows users to add tasks with a specified priority directly, streamlining the process of creating high-priority tasks.

Key changes:

• Implements addpri PRIORITY "TASK" syntax with automatic priority validation and case conversion
• Integrates with existing configuration options like TODOTXT_DATE_ON_ADD
• Provides comprehensive error handling for invalid priority inputs

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
todo.sh	Adds the core addpri command implementation with priority validation and integration
tests/t1050-addpri.sh	Comprehensive test suite covering functionality, edge cases, and error scenarios
USAGE.md	Documentation for the new addpri command with usage examples

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[Copilot]

The help text shows both 'addpri' and 'ap' as separate commands, but they should be documented as aliases of each other. Consider formatting as 'addpri|ap PRIORITY "TEXT TO ADD"' to match the pattern used elsewhere in the help.

Suggested change

	addpri PRIORITY "TEXT TO ADD"
	ap PRIORITY "TEXT TO ADD"
	addpri|ap PRIORITY "TEXT TO ADD"

[cloudrkt]

Implemented.

[Copilot]

The extended glob pattern @([A-Za-z]) requires 'shopt -s extglob' to be set. Consider using a more portable approach like '[[ ${#priority} -eq 1 && "$priority" =~ ^[A-Za-z]$ ]]' or ensure extglob is enabled in the script.

Suggested change

	if [[ "$priority" != @([A-Za-z]) ]]; then
	if [[ ! "$priority" =~ ^[A-Za-z]$ ]]; then

[cloudrkt]

Implemented.