refactor: rename nssa/nssa_core → lee/lee_core

Follow the spel fork's `nssa → lee` refactor (chore/update-lez): the
`#[lez_program]` macro now emits `lee_core::…` paths, so the crate must be
referenced by its real name rather than the `nssa_core` alias.

- Cargo.toml: rename the `nssa_core`/`nssa` dep keys to `lee_core`/`lee` and
  drop the now-redundant `package = "lee_core"`/`package = "lee"` aliases
  (dep name == package name).
- Rust: `nssa_core::` → `lee_core::`, `nssa::` → `lee::` across programs,
  modules, and tools.
- Docs: update the library reference in CLAUDE.md and README.md.

Also drop the dead `NSSA_WALLET_HOME_DIR` env var — superseded by
`LEE_WALLET_HOME_DIR`, which is the only wallet-home var any v0.2.x wallet
reads — from the test tooling (setup-amm-testnet.sh, custom-token.mjs,
run-basecamp-e2e.sh) and docs.

Closes #225

programs/twap_oracle/src/create_current_tick_account.rs

@@ -1,5 +1,5 @@
 use clock_core::{ClockAccountData, CLOCK_01_PROGRAM_ACCOUNT_ID};
-use nssa_core::{
+use lee_core::{
     account::{Account, AccountWithMetadata, Data},
     program::{AccountPostState, Claim, ProgramId},
 };
@@ -75,7 +75,7 @@ pub fn create_current_tick_account(
 
 #[cfg(test)]
 mod tests {
-    use nssa_core::account::{AccountId, Nonce};
+    use lee_core::account::{AccountId, Nonce};
 
     use super::*;
 

programs/twap_oracle/src/create_oracle_price_account.rs

@@ -1,5 +1,5 @@
 use clock_core::{ClockAccountData, CLOCK_01_PROGRAM_ACCOUNT_ID};
-use nssa_core::{
+use lee_core::{
     account::{Account, AccountId, AccountWithMetadata, Data},
     program::{AccountPostState, Claim, ProgramId},
 };
@@ -119,7 +119,7 @@ pub fn create_oracle_price_account(
 
 #[cfg(test)]
 mod tests {
-    use nssa_core::account::Nonce;
+    use lee_core::account::Nonce;
 
     use super::*;
 

programs/twap_oracle/src/create_price_observations.rs

@@ -1,5 +1,5 @@
 use clock_core::{ClockAccountData, CLOCK_01_PROGRAM_ACCOUNT_ID};
-use nssa_core::{
+use lee_core::{
     account::{Account, AccountWithMetadata, Data},
     program::{AccountPostState, Claim, ProgramId},
 };
@@ -99,7 +99,7 @@ pub fn create_price_observations(
 
 #[cfg(test)]
 mod tests {
-    use nssa_core::account::{AccountId, Nonce};
+    use lee_core::account::{AccountId, Nonce};
 
     use super::*;
 

programs/twap_oracle/src/publish_price.rs

@@ -1,5 +1,5 @@
 use clock_core::{ClockAccountData, CLOCK_01_PROGRAM_ACCOUNT_ID};
-use nssa_core::{
+use lee_core::{
     account::{AccountId, AccountWithMetadata, Data},
     program::{AccountPostState, ProgramId},
 };
@@ -210,7 +210,7 @@ pub fn publish_price(
 
 #[cfg(test)]
 mod tests {
-    use nssa_core::account::{Account, AccountId, Nonce};
+    use lee_core::account::{Account, AccountId, Nonce};
     use twap_oracle_core::{
         compute_current_tick_account_pda, compute_oracle_price_account_pda,
         compute_price_observations_pda, tick_to_oracle_price, CurrentTickAccount, ObservationEntry,

programs/twap_oracle/src/record_tick.rs

@@ -1,5 +1,5 @@
 use clock_core::{ClockAccountData, CLOCK_01_PROGRAM_ACCOUNT_ID};
-use nssa_core::{
+use lee_core::{
     account::{AccountId, AccountWithMetadata, Data},
     program::{AccountPostState, ProgramId},
 };
@@ -153,7 +153,7 @@ pub fn record_tick(
 
 #[cfg(test)]
 mod tests {
-    use nssa_core::account::{Account, AccountId, Nonce};
+    use lee_core::account::{Account, AccountId, Nonce};
     use twap_oracle_core::{
         compute_current_tick_account_pda, compute_price_observations_pda, OBSERVATIONS_CAPACITY,
     };

programs/twap_oracle/src/update_current_tick.rs

@@ -1,5 +1,5 @@
 use clock_core::{ClockAccountData, CLOCK_01_PROGRAM_ACCOUNT_ID};
-use nssa_core::{
+use lee_core::{
     account::{AccountWithMetadata, Data},
     program::{AccountPostState, ProgramId},
 };
@@ -61,7 +61,7 @@ pub fn update_current_tick(
 
 #[cfg(test)]
 mod tests {
-    use nssa_core::account::{Account, AccountId, Nonce};
+    use lee_core::account::{Account, AccountId, Nonce};
     use twap_oracle_core::compute_current_tick_account_pda;
 
     use super::*;