fix(token-extensions/group): re-enable group anchor + quasar examples

Both were excluded as "not live", but the real blockers were build/code bugs:

- group/anchor: a dead `spl-token-group-interface = "0.2.5"` dependency (never
  imported in code — the GroupPointer types come from anchor_spl::token_2022)
  transitively pinned an old solana-zk-token-sdk that conflicts with
  ed25519-dalek 2 on `zeroize`, breaking `cargo build-sbf`. Removed the dep;
  the program now builds and its LiteSVM test passes.

- group/quasar: three bugs in src/lib.rs — `Program<System>` should be
  `Program<SystemProgram>` (compile error); the GroupPointer extension opcode
  was 41 (that's GroupMemberPointer) instead of 40; and the mint account was
  allocated 250 bytes instead of 234 (base 82 padded to 165 + 1 account-type
  byte + GroupPointer TLV of 2+2+64), which made InitializeMint2 fail with
  InvalidAccountData. Fixed all three; builds and both tests pass.

Drop both from .github/.ghaignore so CI builds and tests them.

Author: claude

.github/.ghaignore

@@ -19,10 +19,6 @@ compression/cnft-vault/anchor
 # builds but need to test on localhost
 compression/cnft-burn/anchor
 
-# not live
-tokens/token-extensions/group/anchor
-tokens/token-extensions/group/quasar
-
 # CPI quasar project uses subdirectories (hand/ and lever/) instead of a root Quasar.toml
 basics/cross-program-invocation/quasar
 

tokens/token-extensions/group/anchor/programs/group/Cargo.toml

@@ -22,7 +22,6 @@ custom-panic = []
 [dependencies]
 anchor-lang = "1.0.0"
 anchor-spl = "1.0.0"
-spl-token-group-interface = "0.2.5"
 
 [dev-dependencies]
 litesvm = "0.11.0"

tokens/token-extensions/group/quasar/src/lib.rs

@@ -42,13 +42,14 @@ pub struct InitializeGroup {
     #[account(mut)]
     pub mint_account: Signer,
     pub token_program: Program<Token2022Program>,
-    pub system_program: Program<System>,
+    pub system_program: Program<SystemProgram>,
 }
 
 #[inline(always)]
 fn handle_initialize_group(accounts: &mut InitializeGroup) -> Result<(), ProgramError> {
-    // Mint + GroupPointer extension = 250 bytes
-    let mint_size: u64 = 250;
+    // Mint + GroupPointer extension = 234 bytes
+    // (base mint padded to 165 + account_type byte + GroupPointer TLV [2 type + 2 len + 64 data])
+    let mint_size: u64 = 234;
     let lamports = Rent::get()?.try_minimum_balance(mint_size as usize)?;
 
     accounts
@@ -62,10 +63,11 @@ fn handle_initialize_group(accounts: &mut InitializeGroup) -> Result<(), Program
         )
         .invoke()?;
 
-    // InitializeGroupPointer: opcode 41, sub-opcode 0
-    // Data: [41, 0, authority (32 bytes), group_address (32 bytes)]
+    // InitializeGroupPointer: opcode 40, sub-opcode 0
+    // (opcode 41 is GroupMemberPointer, not GroupPointer)
+    // Data: [40, 0, authority (32 bytes), group_address (32 bytes)]
     let mut ext_data = [0u8; 66];
-    ext_data[0] = 41;
+    ext_data[0] = 40;
     ext_data[1] = 0;
     // authority = mint itself (self-referential PDA pattern)
     ext_data[2..34].copy_from_slice(accounts.mint_account.to_account_view().address().as_ref());