feat: migrate smart-updown contract to SPL-token (фантики)

- create_bet: escrow фантиков с bettor на vault (PDA[global,vault]) через anchor_spl::token
- close_bet: выплата фантиков из vault на bettor (CPI с signer_seeds vault)
- state/constants: comments про единицы (token units decimals=6), + VAULT_SEED
- IDL регенерирован (idl/ + relayer/idl/) с аккаунтами bettor_token/vault_token/token_program
- тесты обновлены под токен (10/10 + doctest)

program/programs/smart-updown/Cargo.toml

@@ -14,10 +14,11 @@ default = []
 cpi = ["no-entrypoint"]
 no-entrypoint = []
 no-log-ix-name = []
-idl-build = []
+idl-build = ["anchor-lang/idl-build", "anchor-spl/idl-build"]
 
 [dependencies]
 anchor-lang = "0.31.1"
+anchor-spl = "0.31.1"
 
 [dev-dependencies]
 anchor-lang = "0.31.1"
@@ -27,7 +28,10 @@ solana-pubkey = "2.1"
 solana-signer = "2.1"
 solana-keypair = "2.1"
 solana-clock = "2.1"
+solana-account = "2.1"
 solana-transaction = "2.1"
+spl-token = "7.0.0"
+spl-associated-token-account = "6.0.0"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 
 [lints.rust]