deleted prick.org and split TODOs into header files

Makes more sense - any users of libraries should be aware of what
tasks are to be done, even if they don't have access to the repo
itself.

prick.org

@@ -1,18 +0,0 @@
-#+title: Prick tasks
-#+author: Aryadev Chavali
-#+date: 2025-12-11
-#+filetags: c prick
-
-* prick_darr :prick_darr:
-** TODO Use custom allocator
-Allow users to provide custom allocator functions.  They need to
-provide:
-- alloc
-- realloc
-- free
-* prick_btree :prick_btree:
-** TODO Pack custom user functions into their own structure
-The allocation/print routines should be in their own structure which
-the user passes in.
-
-This means we don't need to have a prick_btree_t structure at all.

prick_btree.h

@@ -11,6 +11,10 @@
 
  An ordered binary tree implementation, allowing the use of custom comparators
  and allocators.
+
+ Tasks:
+ - TODO: Pack user custom functions (allocate, comparison, etc) into a
+   structure.
  */
 
 #ifndef PRICK_BTREE_H

prick_darr.h

@@ -22,6 +22,10 @@
 
  You may want to consider prick_vec.h if you want to more explicit control of
  the dynamic array, and would like a stable pointer to the container itself.
+
+ Tasks:
+ - TODO: Implement ability to use a custom allocator.
+ - TODO: QoL shorthand macro.
  */
 
 #ifndef PRICK_DARR_H