Sync ako/mxcli: escape '/' inside folder names in FOLDER paths

[ako]

Syncs ako/mxcli:main into mendixlabs/mxcli:main: 1 commit since #1366, landed in the fork through ako#1084.

Folders

• A / inside a folder name is escaped in FOLDER paths (marketplace update --save-edits + exec corrupts constant folder paths containing a literal '/' in the folder name #1367). Studio Pro allows / in a folder name, but folder paths were joined and split on a bare /. A constant in Private - String en/de-cryption > Apis was described as folder 'Private - String en/de-cryption/Apis', and replaying the describe output filed it three folders deep, with exit 0.
  • The new package mdl/folderpath writes a / in a segment as \/ and a \ as \\. Splitting is lenient (a backslash before anything else stays literal), so existing paths keep their meaning.
  • BuildFolderPath, the folder resolvers, the page builder and the project tree all use it. Describers that wrote folder '%s' unquoted now quote it, so the escape and apostrophes both survive

[github-actions]

AI Code Review

Critical Issues

None found.

Moderate Issues

None found.

Minor Issues

None found.

What Looks Good

• The PR correctly addresses the core issue: folder names containing '/' were being misinterpreted as path separators during DESCRIBE → exec roundtrips.
• The solution introduces a dedicated mdl/folderpath package with proper escaping/unescaping logic (\/ for '/', \\ for ''), which is:
  • Applied consistently across all folder path handling (project tree, hierarchy, resolvers, builders)
  • Used in DESCRIBE output via mdlQuote (which handles both escaping and quoting)
  • Backward-compatible (lenient splitting preserves existing paths)
• Test coverage is excellent:
  • New unit tests for folderpath package
  • Integration test verifying DESCRIBE → exec roundtrip for slash-containing folder names
  • Added MDL example demonstrating the fix
  • Updated documentation with clear example
• Code changes are focused and minimal:
  • Replaced ad-hoc strings.Split and manual escaping with the new package
  • Updated all folder path consumers (project tree, hierarchy, helpers, builders)
  • No changes to MDL grammar/syntax (purely a runtime fix)
• The fix follows the project's architectural patterns:
  • New functionality properly encapsulated in its own package
  • Consistent with existing MDL property/value patterns (uses standard quoting)
  • Maintains full-stack consistency (touches all necessary layers)

Recommendation

Approve the PR. The changes are correct, well-tested, and maintain consistency with the project's architecture and conventions. The fix resolves the reported issue without introducing regressions.

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