File Manager, Workspaces and some keybindings

- new plugins:
  . neo-tree - file manager
  . workspaces - workspace management (light projects)

- keybindings
  . <leader>g for Neogit
  . <leader>t for Neotree
  . <leader>w for WorkspacesOpen
  . <space>D for fzf.diagnostics_workspace

- options
  . truncate long lines in view (set nowrap)

lua/options.lua

@@ -25,7 +25,8 @@ vim.opt.ignorecase = true -- ignore case in searches by default
 vim.opt.smartcase = true  -- but make it case sensitive if an uppercase is entered
 
 
--- Wrapping movements
+-- Wrapping movements and long lines
 vim.opt.whichwrap = "b,s,<,>,[,]" -- wrap backspace, space and left-right cursor keys
+vim.opt.wrap = false
 -- formatoptions not very well set 
 -- vim.opt.formatoptions = "tac"