Run recursively move tests under examples/ (MystenLabs#17600)

- Run recursively move tests under examples/
- Update tests

## Description 

Describe the changes or additions included in this PR.

## Test plan 

How did you test the new or updated feature?

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

crates/sui-framework-tests/src/unit_tests.rs

@@ -42,7 +42,7 @@ fn run_deepbook_tests() {
 
 #[test]
 #[cfg_attr(msim, ignore)]
-fn run_examples_move_unit_tests() {
+fn run_sui_programmability_examples_move_unit_tests() {
     for example in [
         "basics",
         "capy",
@@ -65,22 +65,29 @@ fn run_examples_move_unit_tests() {
     }
 }
 
+fn check_packages_recursively(path: &PathBuf) -> io::Result<()> {
+    for entry in fs::read_dir(path).unwrap() {
+        let entry = entry?;
+        if entry.path().join("Move.toml").exists() {
+            check_package_builds(entry.path());
+            check_move_unit_tests(entry.path());
+        } else if entry.file_type()?.is_dir() {
+            check_packages_recursively(&entry.path())?;
+        }
+    }
+    Ok(())
+}
+
 #[test]
 #[cfg_attr(msim, ignore)]
-fn run_docs_examples_move_unit_tests() -> io::Result<()> {
+fn run_examples_move_unit_tests() -> io::Result<()> {
     let examples = {
         let mut buf = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
         buf.extend(["..", "..", "examples", "move"]);
         buf
     };
 
-    for entry in fs::read_dir(examples)? {
-        let entry = entry?;
-        if entry.file_type()?.is_dir() && entry.path().join("Move.toml").exists() {
-            check_package_builds(entry.path());
-            check_move_unit_tests(entry.path());
-        }
-    }
+    check_packages_recursively(&examples)?;
 
     Ok(())
 }

examples/move/transfer-to-object/common/sources/identified_payment.move

@@ -5,9 +5,7 @@
 module common::identified_payment {
     use sui::sui::SUI;
     use sui::coin::{Self, Coin};
-    use sui::object::{Self, UID};
-    use sui::transfer::{Self, Receiving};
-    use sui::tx_context::{Self, TxContext};
+    use sui::transfer::Receiving;
     use sui::event;
     use sui::dynamic_field;
 

examples/move/transfer-to-object/shared-with-tto/sources/shared_cash_register.move

@@ -5,11 +5,8 @@ module shared_with_tto::shared_cash_register {
     use common::identified_payment::{Self, IdentifiedPayment, EarmarkedPayment};
     use sui::sui::SUI;
     use sui::coin::Coin;
-    use sui::object::{Self, UID};
-    use sui::transfer::{Self, Receiving};
-    use sui::tx_context::{Self, TxContext};
+    use sui::transfer::Receiving;
     use sui::vec_set::{Self, VecSet};
-    use std::vector;
     use std::string::String;
 
     const EInvalidOwner: u64 = 0;