docs: rename v2-v3 installation guide to v2-v3.md

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: “saileshwar-skyflow”

docs/v2-v3-installation.md docs/v2-v3.mddocs/v2-v3-installation.md renamed to docs/v2-v3.md

@@ -11,14 +11,18 @@ pip install "skyflow-python==2.0.0"
 ### Initialize client
 
 ```python
-from skyflow import SkyflowClient, SkyflowConfig, Credentials
-
-client = SkyflowClient(
-    SkyflowConfig(
-        vault_id="<VAULT_ID>",
-        cluster_id="<CLUSTER_ID>",
-        credentials=Credentials(api_key="<API_KEY>"),
-    )
+from skyflow import Skyflow, LogLevel
+
+client = (
+    Skyflow.builder()
+    .add_vault_config({
+           'vault_id': '<VAULT_ID>',
+           'cluster_id': '<CLUSTER_ID>',
+           'env': Env.PROD,
+           'credentials': credentials
+    })
+    .set_log_level(LogLevel.INFO)
+    .build()
 )
 ```
 
@@ -51,14 +55,18 @@ pip install "skyflow-python==3.0.0"
 ### Initialize client
 
 ```python
-from skyflow import SkyflowClient, SkyflowConfig, Credentials
-
-client = SkyflowClient(
-    SkyflowConfig(
-        vault_id="<VAULT_ID>",
-        cluster_id="<CLUSTER_ID>",
-        credentials=Credentials(api_key="<API_KEY>"),
-    )
+from skyflow import Skyflow, LogLevel
+
+client = (
+    Skyflow.builder()
+    .add_vault_config({
+           'vault_id': '<VAULT_ID>',
+           'cluster_id': '<CLUSTER_ID>',
+           'env': Env.PROD,
+           'credentials': credentials
+    })
+    .set_log_level(LogLevel.INFO)
+    .build()
 )
 ```