Docs: V0.2-tutorials/least squares example

[Tuna2222]

Description

Docs:

• Add a tutorial for the least squares problem:
  • Modify tutorials/introduction.md
  • Add a least squares example to the tutorials/least_squares folder.

Motivation and Context

Refer to the JuMP.jl Tutorials section.

How has this been tested

First, download the RLinearAlgebra.jl to your local Julia environment.
Then, open Julia in the folder of RLinearAlgebra.jl, and use the following codes to see the document:

] activate docs/
using LiveServer
servedocs()

Types of changes

• CI
• Docs
• Feature
• Fix
• Performance
• Refactor
• Style
• Test
• Other (use sparingly):

Checklists:

Code and Comments
If this PR includes modification to the code base, please select all that apply.

• My code follows the code style of this project.
• I have updated all package dependencies (if any).
• I have included all relevant files to realize the functionality of the PR.
• I have exported relevant functionality (if any).

API Documentation

• For every exported function (if any), I have included a detailed docstring.
• I have checked the spelling and grammar of all docstring updates through an external tool.
• I have checked that the docstring's function signature is correctly formatted and has all arguments.
• I have checked that the docstring's list of arguments, fields, or return values match the function.
• I have compiled the docs locally and read through all docstring updates to check for errors.

Manual Documentation

• I have checked the spelling and grammar of all manual updates through an external tool.
• Any code included in the docstring is tested using doc tests to ensure consistency.
• I have compiled the docs locally and read through all manual updates to check for errors.

Testing

• I have added unit tests to cover my changes. (For Macros, be sure to check
  @code_lowered and
  @code_typed)
• All new and existing tests passed.
• I have achieved sufficient code coverage.

[Copilot]

Pull Request Overview

This PR adds comprehensive tutorial documentation, fixes a typo in documentation, and corrects a boundary condition bug in the logger's convergence check.

• Adds tutorial documentation covering consistent linear systems and least-squares problems
• Fixes typo in SparseSign compressor documentation ("fo" → "of")
• Corrects iteration boundary check in BasicLogger from <= to < to prevent out-of-bounds errors

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/Solvers/Loggers/basic_logger.jl	Fixed off-by-one error in iteration comparison to prevent bounds errors
src/Compressors/sparse_sign.jl	Corrected typo in documentation comment
docs/src/tutorials/introduction.md	Added introduction page for tutorials with problem set overview
docs/src/tutorials/consistent_system/consistent_system.md	Added tutorial for solving consistent linear systems
docs/src/tutorials/consistent_system/consistent_system_configure.md	Added advanced tutorial showing modular customization of solvers
docs/src/tutorials/least_squares/least_squares.md	Added tutorial for solving least-squares problems
docs/src/tutorials/least_squares/least_squares_configure.md	Added placeholder for least-squares customization tutorial
docs/make.jl	Enabled tutorials section in documentation
.github/workflows/Documenter.yml	Simplified workflow triggers, removed obsolete branches

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[Copilot]

Grammatical error: 'left' should be 'leave' to maintain proper verb tense consistency.

Suggested change

	This doc will introduce more compressors, and left the other modules,
	This doc will introduce more compressors, and leave the other modules,

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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