feat: Add global :Org command and global Org lua variable

These allow interacting with orgmode in a more user friendly way

docs/index.org

@@ -3,6 +3,9 @@
 Nvim orgmode is a clone of Emacs Orgmode for Neovim 0.10.0+.
 It aims to be a feature-complete implementation of Orgmode features in Neovim.
 
+💡 TIP: To view this documentation offline in Neovim, run =:Org help=. More info in [[#globals-commands][Globals and commands]] section.
+
+
 ** Quick start
 :PROPERTIES:
 :CUSTOM_ID: quick-start
@@ -45,3 +48,22 @@ that demonstrates how the similar Orgmode clone [[https://github.com/dhruvasagar
 :END:
 Nvim-orgmode exoses a Lua API that can be used to interact with the orgmode. To view it, check [[file:../docs/orgmode-api.txt][orgmode-api.txt]]
 or do =:h OrgApi= in Neovim.
+
+** Globals and commands
+:PROPERTIES:
+:CUSTOM_ID: globals-commands
+:END:
+There are 2 additional ways to interact with Orgmode:
+1. Through the =:Org= command
+2. Through =Org= Lua global variable
+
+List of available actions:
+- =:Org help= - Open this documentation in new tab, set working directory to the docs folder for the tab to allow browsing
+- =:Org helpgrep= - Open search agenda view that allows searching through the documentation
+- =:Org agenda {type?}= - Open agenda view by the shortcut, for example =:Org agenda M= will open =tags_todo= view. When =type= is omitted, it opens up Agenda view.
+
+All of the commands above can be executed through the global Lua =Org= variable. Examples:
+- =Org.help()=
+- =Org.helpgrep()=
+- =Org.open()= - Opens =agenda= view
+- =Org.open.m()= - Opens =tags= view

lua/orgmode/agenda/init.lua

@@ -17,6 +17,7 @@ local AgendaTypes = require('orgmode.agenda.types')
 local Agenda = {}
 
 ---@param opts? { highlighter: OrgHighlighter, files: OrgFiles }
+---@return OrgAgenda
 function Agenda:new(opts)
   opts = opts or {}
   local data = {

lua/orgmode/init.lua

@@ -1,4 +1,5 @@
 _G.orgmode = _G.orgmode or {}
+_G.Org = _G.Org or {}
 ---@type Org | nil
 local instance = nil
 
@@ -35,6 +36,7 @@ setmetatable(Org, {
 })
 
 function Org:new()
+  require('orgmode.org.global')(self)
   self.initialized = false
   self:setup_autocmds()
   require('orgmode.config'):setup_ts_predicates()

lua/orgmode/org/global.lua

@@ -0,0 +1,91 @@
+local current_file_path = string.sub(debug.getinfo(1, 'S').source, 2)
+local docs_dir = vim.fn.fnamemodify(current_file_path, ':p:h:h:h:h') .. '/docs'
+
+---@param orgmode Org
+local build = function(orgmode)
+  local Open = setmetatable({}, {
+    __call = function(t, ...)
+      t.a(...)
+    end,
+    __index = function(t, k)
+      local existing = rawget(t, k)
+      if existing then
+        return existing
+      end
+
+      ---@diagnostic disable-next-line: invisible
+      local keys = orgmode.agenda:_build_menu():get_valid_keys()
+
+      for key, item in pairs(keys) do
+        t[key] = item.action
+      end
+
+      return rawget(t, k)
+    end,
+  })
+
+  for _, shortcut in ipairs({ 'a', 't', 'm', 'M', 's' }) do
+    Open[shortcut] = function()
+      return orgmode.agenda:open_by_key(shortcut)
+    end
+  end
+
+  local OrgGlobal = {
+    help = function()
+      vim.cmd(('tabnew %s'):format(('%s/%s'):format(docs_dir, 'index.org')))
+      vim.cmd(('tcd %s'):format(docs_dir))
+    end,
+
+    helpgrep = function()
+      orgmode.agenda:open_view('search', {
+        agenda_files = ('%s/**/*'):format(docs_dir),
+      })
+    end,
+
+    open = Open,
+  }
+
+  _G.Org = OrgGlobal
+end
+
+---@param opts string[]
+---@return table
+local function resolve_item(opts)
+  ---@type table
+  local obj = _G.Org
+  for _, opt in ipairs(opts) do
+    if type(obj) ~= 'table' then
+      return obj
+    end
+    if obj[opt] then
+      obj = obj[opt]
+    end
+  end
+
+  return obj
+end
+
+vim.api.nvim_create_user_command('Org', function(opts)
+  local item = resolve_item(opts.fargs)
+  if item and type(item) == 'function' then
+    return item()
+  end
+  require('orgmode.utils').echo_error(('Invalid command "Org %s"'):format(opts.args))
+end, {
+  nargs = '*',
+  complete = function(arg_lead, cmd_line)
+    local opts = vim.split(cmd_line:sub(5), '%s+')
+    local item = resolve_item(opts)
+    if type(item) ~= 'table' then
+      return {}
+    end
+    local list = vim.tbl_keys(item)
+
+    if arg_lead == '' then
+      return list
+    end
+    return vim.fn.matchfuzzy(list, arg_lead)
+  end,
+})
+
+return build

lua/orgmode/ui/menu.lua

@@ -135,14 +135,19 @@ function Menu._default_menu(data)
   return entry.action()
 end
 
-function Menu:get_entry_by_key(key)
+---@return table<string, OrgMenuOption | OrgMenuSeparator>
+function Menu:get_valid_keys()
   local valid_keys = {}
   for _, item in ipairs(self.items) do
     if item.key then
       valid_keys[item.key] = item
     end
   end
-  return valid_keys[key]
+  return valid_keys
+end
+
+function Menu:get_entry_by_key(key)
+  return self:get_valid_keys()[key]
 end
 
 function Menu:open()