chore: add repo wiki and non-interactive VS Code defaults

[th3w1zard1]

Summary

This branch now bundles two repository maintenance tasks:

1. finish the ChangeEdit VS Code automation cleanup by replacing interactive launch and task inputs with workspace defaults
2. add a checked-out GitHub wiki workflow via the top-level wiki/ submodule and populate it with contributor and mod-author guides sourced from the repo docs and codebase

What Changed

• switched .vscode/launch.json from promptString inputs to changeEdit.* workspace settings
• added default changeEdit.delphiCompiler, changeEdit.executable, and changeEdit.wineCommand values in .vscode/settings.json
• updated repo docs so the Windows-native and Wine-backed VS Code workflow is non-interactive and discoverable
• added .gitmodules and the top-level wiki/ git submodule pointing at https://github.com/OpenKotOR/ChangeEdit.wiki.git
• authored the initial wiki page set covering getting started, changes.ini structure, settings, TLK, 2DA, GFF/SSF, install/script flows, namespaces, format limits, contributor guidance, build/smoke-test workflow, and known caveats
• refreshed and completed the active wiki implementation plan in docs/plans/2026-05-27-005-wiki-submodule-and-user-docs-plan.md

Validation

• ran the repo/task validation checks from the earlier VS Code cleanup and confirmed the Wine and compiler availability tasks now fail clearly instead of blocking on prompts when prerequisites are missing
• verified gh repo view --json hasWikiEnabled reports the repository wiki is enabled
• verified the wiki git remote exists via git ls-remote --symref https://github.com/OpenKotOR/ChangeEdit.wiki.git HEAD refs/heads/*
• added the wiki as a real git submodule and pushed the wiki repository content to master at 0800fd5
• ran git diff --check on the README, plan file, submodule metadata, and wiki markdown content after the review/autofix pass
• browser testing was not applicable because this branch changes a Delphi desktop repo and markdown/wiki content rather than a web surface

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