Update README with links to implementations

Author: tilo-14

airdrop-implementations/README.md

@@ -1,8 +1,8 @@
 # Airdrop Implementations
 
-Simple Implementation: simple-claim - Distributes compressed tokens that get decompressed on claim
+Simple Implementation: [simple-claim](./simple-claim) - Distributes compressed tokens that get decompressed on claim
 
-Advanced Implementation: distributor - Distributes SPL tokens, uses compressed PDAs to track claims
+Advanced Implementation: [distributor](./distributor) - Distributes SPL tokens, uses compressed PDAs to track claims
 
 ## Quick comparison
 
@@ -20,3 +20,5 @@ Advanced Implementation: distributor - Distributes SPL tokens, uses compressed P
 | simple-claim             | ~0.00001 SOL |      ~1 SOL |
 | distributor (compressed) | ~0.00005 SOL |      ~5 SOL |
 | distributor (original)   |   ~0.002 SOL |    ~200 SOL |
+
+```