vscode-test was renamed to @vscode/test-electron and
the former package was unable to run tests on windows.
this commit removes vscode-test and updates it to the
last version of @vscode/test-electron

improves recolorization logic, keeping originally darker
colors dark and lighter colors light even after recolor

adds support for a custom svg attribute `mit-no-recolor`
that, when set to true, will keep the original color of
the svg node on which is applied

support for creating clones by configuring them
in the fileIcons.ts and folderIcons.ts files
so that the icons are created at build time
allowing contributors to create clones that are
shipped with the extension