feat: add mark capabilites

[kyazdani42]

this feature add marking capabilities in nvim-tree.

• Binding is m for toggle the mark of a node, M to disable all the current marks
• a new NvimTreeMarkedFile highlight group was added, green by default
• get the list of the marks with require'nvim-tree.marks'.get_marks() which will return a list of the tree nodes which you can do anything you want with.
• toggle a mark with require'nvim-tree.marks'.toggle_mark()
• disable all marks with require'nvim-tree.marks'.disable_all()

fixes #51 and #221 and #595

TODO:

• add example usage for moving multiple files.

[GabeDuarteM]

Is documentation the only thing blocking this?

[kyazdani42]

yes. I'll write it this weekend.

[sandangel]

hi, let me know if I could help. I also need this feature.

[kyazdani42]

hi @sandangel, i'll try to finish this asap, just missing some example docs on how to use it

[shubham-cpp]

Also one more interesting feature with marks would be to add marks using regex/pattern.
Lets say we have a command NvimTreeMarkFilePattern which will prompt us to input a pattern and then automatically mark all the files that match a pattern.

Interesting Use cases: Mark all python files(pattern: \.py$) or delete non json files(pattern: (\.json$)@!)
Note: these patterns are vim regex

[vcraescu]

Hi!

What is the status of this?

Thanks!

[kyazdani42]

hi @vcraescu.
I have completely forgot about it, and there are too many conflicts, i believe the mark.lua file can be copied but the rest of implementation should be rewritten. I'll do it when i have some time if someone doesn't do it first.

[sandangel]

hi, how could I help implement this from the PR you made?

[kyazdani42]

hi @sandangel. Copy the marks file, and reimplement the mappings + the rendering logic

[kyazdani42]

closing in favor of #1412