Force recovery sample

Author: andreyaksenov

doc/code_snippets/snippets/config/instances.enabled/force_recovery/README.md

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+# Force recovery
+
+A sample application demonstrating how to start an instance with a corrupted write-ahead log file.
+
+## Running
+
+- To start the instance using the `tt` utility, execute the following command in the [config](../../../config) directory:
+
+  ```console
+  $ TT_FORCE_RECOVERY=true tt start force_recovery
+  ```
+
+- To start the instance using the `tarantool` command, you can use both the `TT_FORCE_RECOVERY` environment variable and add the `--force-recovery` option.
+  In the example below, the `tarantool` command is executed in the [config/instances.enabled/force_recovery](../../../config/instances.enabled/force_recovery) directory:
+
+  ```console
+  $ tarantool --name instance001 --config config.yaml --force-recovery -i
+  ```

doc/code_snippets/snippets/config/instances.enabled/force_recovery/config.yaml

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+groups:
+  group001:
+    replicasets:
+      replicaset001:
+        instances:
+          instance001:
+            iproto:
+              listen:
+              - uri: '127.0.0.1:3301'

doc/code_snippets/snippets/config/instances.enabled/force_recovery/instances.yml

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+instance001: