Update ignore and export rules for project files

[theaminulai]

Refined .distignore, .gitattributes, and composer.json to consistently exclude development, configuration, and documentation files and directories from distributions and exports. This improves package cleanliness and ensures only necessary files are included in releases.

[Copilot]

Pull request overview

This PR aligns Composer, Git attributes, and WordPress distribution ignore rules so that development, configuration, and documentation artifacts are consistently excluded from release packages and exports.

Changes:

• Expanded composer.json’s archive.exclude list to omit dev-only directories (e.g., dev-docs, dev-note, docs, src) and common config/docs files from Composer-generated archives.
• Reworked .gitattributes to explicitly mark the same dev/config/docs directories and files as export-ignore for git archive ZIP exports.
• Simplified and reorganized .distignore to mirror the same sets of directories and files for WordPress plugin release builds.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
composer.json	Updates archive.exclude so Composer archives exclude dev directories and project metadata/configuration, keeping plugin release ZIPs clean.
.gitattributes	Defines a clear list of dev/config/docs directories and files as export-ignore to align Git exports with Composer and .distignore behavior.
.distignore	Normalizes directory and file ignore patterns to match Composer and Git export rules, ensuring WordPress distributions omit non-runtime assets.