fix: add file: prefix to org-mode links for Emacs resolution

Emorg org-mode requires [[file:path]] syntax for file links to be
clickable. Updated both extract.mjs and scaffold-notes.mjs generators,
and fixed all 200 existing note files.

org/study_deck_02/dsa/binary-search/0004-median-of-two-sorted-arrays.org

@@ -1,7 +1,7 @@
 * TODO 0004. Median of Two Sorted Arrays :hard:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0004. Median of Two Sorted Arrays][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0004. Median of Two Sorted Arrays][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0033-search-in-rotated-sorted-array.org

@@ -1,7 +1,7 @@
 * TODO 0033. Search In Rotated Sorted Array :medium:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0033. Search In Rotated Sorted Array][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0033. Search In Rotated Sorted Array][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0074-search-a-2d-matrix.org

@@ -1,7 +1,7 @@
 * TODO 0074. Search a 2D Matrix :medium:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0074. Search a 2D Matrix][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0074. Search a 2D Matrix][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0153-find-minimum-in-rotated-sorted-array.org

@@ -1,7 +1,7 @@
 * TODO 0153. Find Minimum In Rotated Sorted Array :medium:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0153. Find Minimum In Rotated Sorted Array][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0153. Find Minimum In Rotated Sorted Array][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0704-binary-search.org

@@ -1,7 +1,7 @@
 * TODO 0704. Binary Search :easy:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0704. Binary Search][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0704. Binary Search][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0719-find-k-th-smallest-pair-distance.org

@@ -1,7 +1,7 @@
 * TODO 0719. Find K-th Smallest Pair Distance :hard:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0719. Find K-th Smallest Pair Distance][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0719. Find K-th Smallest Pair Distance][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0875-koko-eating-bananas.org

@@ -1,7 +1,7 @@
 * TODO 0875. Koko Eating Bananas :medium:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0875. Koko Eating Bananas][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0875. Koko Eating Bananas][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/0981-time-based-key-value-store.org

@@ -1,7 +1,7 @@
 * TODO 0981. Time Based Key Value Store :medium:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*0981. Time Based Key Value Store][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*0981. Time Based Key Value Store][Roadmap]]
 :END:
 
 ** TODO Approach

org/study_deck_02/dsa/binary-search/2300-successful-pairs-of-spells-and-potions.org

@@ -1,7 +1,7 @@
 * TODO 2300. Successful Pairs of Spells and Potions :medium:
 #+PROPERTY: STUDY_DECK_02
 :PROPERTIES:
-:NEETCODE: [[../../roadmap.org::*2300. Successful Pairs of Spells and Potions][Roadmap]]
+:NEETCODE: [[file:../../roadmap.org::*2300. Successful Pairs of Spells and Potions][Roadmap]]
 :END:
 
 ** TODO Approach