refactor: move programs into programs and UIs into apps

This refactors the repository structure as it has grown over time.

programs/token/src/initialize.rs

@@ -0,0 +1,39 @@
+use nssa_core::{
+    account::{Account, AccountWithMetadata, Data},
+    program::{AccountPostState, Claim, ProgramId},
+};
+use token_core::{TokenDefinition, TokenHolding};
+
+pub fn initialize_account(
+    definition_account: AccountWithMetadata,
+    account_to_initialize: AccountWithMetadata,
+    token_program_id: ProgramId,
+) -> Vec<AccountPostState> {
+    assert_eq!(
+        account_to_initialize.account,
+        Account::default(),
+        "Only Uninitialized accounts can be initialized"
+    );
+    assert!(
+        account_to_initialize.is_authorized,
+        "Account to initialize must be authorized"
+    );
+    assert_eq!(
+        definition_account.account.program_owner, token_program_id,
+        "Token definition must be owned by token program"
+    );
+
+    let definition = TokenDefinition::try_from(&definition_account.account.data)
+        .expect("Definition account must be valid");
+    let holding =
+        TokenHolding::zeroized_from_definition(definition_account.account_id, &definition);
+
+    let definition_post = definition_account.account;
+    let mut account_to_initialize = account_to_initialize.account;
+    account_to_initialize.data = Data::from(&holding);
+
+    vec![
+        AccountPostState::new(definition_post),
+        AccountPostState::new_claimed(account_to_initialize, Claim::Authorized),
+    ]
+}