etcd-website: reorganise v3.7

Signed-off-by: Wendy Ha <139814343+wendy-ha18@users.noreply.github.com>

Author: wendy-ha18

content/en/docs/v3.7/tasks/_index.md

@@ -0,0 +1,5 @@
+---
+title: Tasks
+weight: 90
+description: This section provides task-focused guides for developers building applications with etcd, and for operators responsible for deploying, configuring, and maintaining etcd clusters.
+---

content/en/docs/v3.7/tasks/developer/_index.md

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+---
+title: Developer Tasks
+weight: 150
+description: Step-by-step guides for developers using etcd as a key-value store in their applications.
+---

…cs/v3.7/tutorials/how-to-create-lease.md …7/tasks/developer/how-to-create-lease.mdcontent/en/docs/v3.7/tutorials/how-to-create-lease.md renamed to content/en/docs/v3.7/tasks/developer/how-to-create-lease.md content/en/docs/v3.7/tutorials/how-to-create-lease.md renamed to content/en/docs/v3.7/tasks/developer/how-to-create-lease.md

@@ -1,7 +1,7 @@
 ---
 title: Writing to etcd
 description: Adding a KV pair to an etcd cluster
-weight: 200
+weight: 250
 ---
 
 ## Prerequisites

…cs/v3.7/tutorials/how-to-create-locks.md …7/tasks/developer/how-to-create-locks.mdcontent/en/docs/v3.7/tutorials/how-to-create-locks.md renamed to content/en/docs/v3.7/tasks/developer/how-to-create-locks.md content/en/docs/v3.7/tutorials/how-to-create-locks.md renamed to content/en/docs/v3.7/tasks/developer/how-to-create-locks.md

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+---
+title: Operator Tasks
+weight: 95
+description: Operational guides for deploying, configuring, and maintaining an etcd cluster.
+---