add push procedure

docs/commands/push.md

@@ -1,32 +1,14 @@
 
 ## Push
 
-```mermaid
-flowchart TD
-    A[Start] --> G[Get staged objects]
-    G --> GNO[Get next object]
-    GNO --> H{Object empty ?}
-    H --> |No| B{Is a directory ?}
-    H ----> |Yes| F[End]
-    B --> |Yes| C[Push Folder]
-    B --> |No| E[Push File]
-    C --> GNO
-    E --> GNO
-```
-
-## Pushing a folder
-
-```mermaid
-flowchart TD
-    A[Start] --> B{Is local folder older than the server one ?}
-    
-
-```
-
-
-## Pushing a file
-
-```mermaid
-
-
-```
+1. Get list of file and folder to push from ``.nextsync/index``
+2. For each object in the list:
+    * If it is a file:
+        * Check if the file exists on the server
+        * If a collision occurs, compare the modification date (given by the file blob and the server)
+            * If it is more recent download the file under with ``.dist`` extension
+            * Else overwrite the file
+        * If not collision occurs, upload the file
+    * If is it a folder:
+        * If the folder exists on the server apply this procedure for its content
+        * Else upload it