Modified a few things:

- Finished implementing relative date parsing and migrated date parsing
  from Flag(T) to it's own dedicated module. Additionally added a
  the ability to do "recursive" relative operations for time searching.
- Additionally made a Struct & Enum for containing relative operations
  around dates.
- Added additional checks in App & CommandNode(T) around checking
  env_vars of flags & checking for duplicate commands
- Added a CommandMeta record to contain the classname of the
  CommandNode(T)
- Seperated out all of the monolitic files (command_node.cr & file.cr).
  Moved the base classes and records into their own files in the dir
  with the same name of their generic counterparts.
- Fixed a number of macro related bugs around Command.argument &
  CliGen.add_global_flag
- My ass hurts from sitting here for hours and doing these changes and
  arguing with claude over what needs to be done. Fun tho.

src/cligen.cr

@@ -1,6 +1,5 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+# SPDX-License-Identifier: Apache-2.0
+# Copyright 2026 Tristan Ancelet
 
 require "./cligen/exceptions"
 require "./cligen/coercable"
@@ -9,6 +8,7 @@ require "./cligen/annotations"
 require "./cligen/format"
 require "./cligen/regex"
 require "./cligen/flag"
+require "./cligen/timeparse"
 require "./cligen/command"
 require "./cligen/command_node"
 require "./cligen/app"
@@ -16,32 +16,11 @@ require "./cligen/app"
 module CliGen
   VERSION = "0.1.0"
 
+  APPNAME = File.basename(PROGRAM_NAME)
+
   macro override_help_template(filepath)
     {% raise "ERROR : CliGen.override_help_template : File(#{filepath}) doesn't exist" unless file_exists?(filepath) %}
     CliGen::HELP_OVERRIDE_TEMPLATE = {{`readlink -f #{filepath}`.strip.stringify}}
   end
-
-  APPNAME = File.basename(PROGRAM_NAME)
-
-  record AdditionalDefaultFlag,
-    short : String,
-    long : String,
-    description : String,
-    work : String -> 
-
-  ADDITIONAL_DEFAULT_FLAGS = [] of AdditionalDefaultFlag
-
-  def self.add_default_flag(short : String = "", long : String = "", description : String = "", &work : String -> )
-    raise "ERROR : add_default_flag : You must provide a description" if description.empty?
-    ADDITIONAL_DEFAULT_FLAGS << AdditionalDefaultFlag.new(
-      short: short,
-      long: long,
-      description: description,
-      work: work
-    )
-  end
-
-  annotation DefaultFlag
-  end
 end