TCEs for select command pages (#2824)

* TCEs for select command pages

* Preemptive modifications from previous reviews

* Update to previous commit

doctests/cmds-hash.js

@@ -0,0 +1,71 @@
+// EXAMPLE: cmds_hash
+// HIDE_START
+import assert from 'node:assert';
+import { createClient } from 'redis';
+
+const client = createClient();
+await client.connect().catch(console.error);
+// HIDE_END
+
+// STEP_START hset
+const res1 = await client.hSet('myhash', 'field1', 'Hello')
+console.log(res1) // 1
+
+const res2 = await client.hGet('myhash', 'field1')
+console.log(res2) // Hello
+
+const res3 = await client.hSet(
+  'myhash',
+  {
+    'field2': 'Hi',
+    'field3': 'World'
+  }
+)
+console.log(res3) // 2
+
+const res4 = await client.hGet('myhash', 'field2')
+console.log(res4) // Hi
+
+const res5 = await client.hGet('myhash', 'field3')
+console.log(res5) // World
+
+const res6 = await client.hGetAll('myhash')
+console.log(res6)  
+
+// REMOVE_START
+assert.equal(res1, 1);
+assert.equal(res2, 'Hello');
+assert.equal(res3, 2);
+assert.equal(res4, 'Hi');
+assert.equal(res5, 'World');
+assert.deepEqual(res6, {
+  field1: 'Hello',
+  field2: 'Hi',
+  field3: 'World'
+});
+await client.del('myhash')
+// REMOVE_END
+// STEP_END
+
+// STEP_START hget
+const res7 = await client.hSet('myhash', 'field1', 'foo')
+console.log(res7) // 1
+
+const res8 = await client.hGet('myhash', 'field1')
+console.log(res8) // foo
+
+const res9 = await client.hGet('myhash', 'field2')
+console.log(res9) // foo
+
+// REMOVE_START
+assert.equal(res7, 1);
+assert.equal(res8, 'foo');
+assert.equal(res9, null);
+await client.del('myhash')
+// REMOVE_END
+// STEP_END
+
+// HIDE_START
+await client.quit();
+// HIDE_END
+