Add setting to hide arrow folder

[Lirrrx]

I think it would be a good feature to add the possibility of hiding those arrows and to include an alternative icon for opened folders.

[Yannl]

To hide the folders arrow, here is the implementation by "vscode-material-icon-theme":

• https://github.com/PKief/vscode-material-icon-theme/blob/7ac65d3e296b77458524d59bf03df7286369bd12/src/commands/explorerArrows.ts
• https://github.com/PKief/vscode-material-icon-theme/blob/7ac65d3e296b77458524d59bf03df7286369bd12/src/commands/index.ts#L20
• https://github.com/PKief/vscode-material-icon-theme/blob/7ac65d3e296b77458524d59bf03df7286369bd12/package.json#L125
• https://github.com/PKief/vscode-material-icon-theme/blob/7ac65d3e296b77458524d59bf03df7286369bd12/package.json#L225

their initial commit: https://github.com/PKief/vscode-material-icon-theme/commit/818e81d944c5cf4c8f4863b8f93ace67e3ddb357#diff-969f58e5c634101c5f9665e6290ab35c17381d986213fa2def5e96335e9286b8

and corresponding issue: https://github.com/PKief/vscode-material-icon-theme/issues/161

[Yannl]

To keep a visual indication of the open/closed folder state, we also need a new icon for the open folder.

Sadly there is no open folder icon in the Jetbrain 2023 icons set.

We can create one or reuse https://intellij-icons.jetbrains.design/icons/RubyIcons/icons/expui/rails/projectView/incompleteFolder_dark.svg

(Source = https://jetbrains.design/intellij/resources/icons_list/)

[createdbymahmood]

any updates on this?