chore: remove .vscode/settings.json and ignore the directory

[alexeyv]

.vscode/settings.json wired Prettier and ESLint as save-time formatters and attached the package.json schema. None of those exist at the root since #2834. The rest of the file was a 2025 spelling list and Copilot chat preferences, and nothing in the repo reads it.

The file is removed and .vscode/ joins the ignored personal editor directories in .gitignore.

[greptile-apps]

Greptile Summary

This PR removes obsolete shared VS Code workspace settings and ignores the .vscode/ directory as personal editor configuration.

• Deletes formatter, schema, spelling, and Copilot preferences that are no longer used by repository tooling.
• Adds .vscode/ alongside other ignored personal customization directories.

Confidence Score: 5/5

The PR appears safe to merge with no actionable issues identified.

The deleted settings are not consumed by repository workflows, their former root formatter dependencies are absent, and ignoring .vscode/ is consistent with neighboring personal-editor entries.

Important Files Changed

Filename	Overview
.gitignore	Adds .vscode/ consistently with the existing section for ignored personal customization files.
.vscode/settings.json	Removes obsolete editor settings with no remaining repository references or required tooling dependencies.

_{Reviews (1): Last reviewed commit: "chore: remove .vscode/settings.json and ..." | Re-trigger Greptile}