WIP: GTD Base Features

[danymat]

• To follow the discussion regarding GTD implementation in Neorg, please go to GTD workflow #61
• To read the GTD specs in neorg, please go to Proposition for GTD specs on neorg #67

This is the first iteration of GTD base features:

• Specifying a workplace for gtd
• Creating GTD Capture Workflow
  • Created a UI for capturing a task
  • The task captured is written in an inbox.norg file
  • Created a Neorg command for it : Neorg gtd capture
  • Created a keybinding for it: gtda (will probably be deleted/modified)
  • Use a popup with quick selection
• Fields specification for a task like This is a task @ExampleContext +"Example Project"
  • Support for contexts (e.g @home)
  • Support for project (+"this is a project")
  • Support for due dates (e.g $due:tomorrow with today, tomorrow, $d, $m, $w, and any date with format YY-mm-dd recognized. $ is treated as number, for example 10d is 10 days from now)
  • Support for start dates (same syntax as due dates, but starting with $start:)
  • Support for note (e.g $note:"this is a note")
• Operations on tasks
  • Moving tasks between projects/.norg files
  • Adding tasks after specific projects

In order to test the implementation:

1. Use the forked repo:

    use {
        'danymat/neorg',
        requires = "nvim-lua/plenary.nvim",
        branch = "gtd_base"
    }

2. Configure Neorg by enabling the required modules

require('neorg').setup {
    load = {
        ["core.defaults"] = {},
        ["core.keybinds"] = { -- REQUIRED FOR GTD
            config = {
                default_keybinds = true,
                neorg_leader = "<Leader>o"
            }
        },
        ["core.norg.concealer"] = {}, -- Allows for use of icons
        ["core.norg.dirman"] = { -- REQUIRED FOR GTD
            config = {
                workspaces = {
                    main = "~/neorg",
                    gtd = "~/gtd"
                }
            }
        },
        ["core.gtd.base"] = { -- REQUIRED FOR GTD
            config = { workspace = "gtd" }
        },
        ["core.ui"] = {}, -- REQUIRED FOR GTD
    }
}

[danymat]

I'm merging now this PR in gtd_base branch, and we will continue the development from this branch.