Add history Extension

[Arpan-206]

Summary by CodeRabbit

• New Features

  • Introduced a "History" extension for the shell course, enabling users to view and recall previously entered commands.
  • Added support for the history builtin command to list command history, with optional limiting of entries.
  • Enabled navigation through command history using the UP and DOWN arrow keys, including executing recalled commands with ENTER.

• Documentation

  • Added detailed stage descriptions and test instructions for new history-related features.

[linear]

CC-1739 Implement the shell history extension

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

A new "history" extension is added to the shell course, introducing six sequential stages that guide the implementation of command history features. These stages incrementally add support for the history builtin, limiting history output, and navigating and executing previous commands using the UP and DOWN arrow keys.

Changes

File(s)	Change Summary
course-definition.yml	Added a new "history" extension with six new stages for command history functionality; minor comment fix.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant Shell

    User->>Shell: Enter command
    Shell->>Shell: Store command in history
    User->>Shell: Type 'history'
    Shell->>User: Display command history
    User->>Shell: Press UP arrow
    Shell->>User: Recall previous command
    User->>Shell: Press DOWN arrow
    Shell->>User: Recall next command
    User->>Shell: Press ENTER
    Shell->>Shell: Execute recalled command

Loading

Poem

In the shell where commands do dwell,
A rabbit hops with tales to tell.
Now history’s here—UP and DOWN you may roam,
Recall your commands and feel right at home.
With ENTER you leap, your past to repeat—
Oh, what a shell, so clever and neat!
🐇⌨️✨

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📥 Commits

Reviewing files that changed from the base of the PR and between eef1fc6 and f9fc7d1.

📒 Files selected for processing (1)

• course-definition.yml (3 hunks)

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