Feature: Add "/toggle-sidebar" command

[MrShahin2004]

What does it do?

This tiny feature adds a command to the main / command menu which toggles the right sidebar with the title /toggle-sidebar.

There were no built-in commands for this feature and the width of sidebar was hardcoded, so I decided to add this myself.

[github-actions]

Hey! Your PR title Feature: Add "/toggle-sidebar" command doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

This PR doesn't fully meet our contributing guidelines and PR template.

What needs to be fixed:

• PR description is missing required template sections. Please use the PR template.

Please edit this PR description to address the above within 2 hours, or it will be automatically closed.

If you believe this was flagged incorrectly, please let a maintainer know.

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on my search, I found two potentially related PRs:

1. PR feat(tui): resizable, collapsible sidebar rail #46818 - feat(tui): resizable, collapsible sidebar rail

   • Addresses sidebar functionality and collapsibility which may overlap with toggle functionality

2. PR feat: add persistent sidebar overlay toggle in command palette (resolves #6086) #6093 - feat: add persistent sidebar overlay toggle in command palette (resolves #6086)

   • Directly addresses adding a sidebar toggle feature in the command palette, which is very similar to the /toggle-sidebar command in PR Feature: Add "/toggle-sidebar" command #48614

PR #6093 appears to be the most directly related as it implements sidebar toggle functionality accessible via the command palette. You may want to review that PR to ensure PR #48614 doesn't duplicate existing functionality or to coordinate with any related work.

[github-actions]

This pull request has been automatically closed because it was not updated to meet our contributing guidelines within the 2-hour window.

Feel free to open a new pull request that follows our guidelines.