fix alts for pictures in entities part + add russian translation for it

Author: wm-wm-wm

mddocs/docs/en/entities/index.md

@@ -348,7 +348,7 @@ It contains following fields:
   Currently, OpenLineage sends only symlinks `HDFS location → Hive table` which [do not exist in the real world](https://github.com/OpenLineage/OpenLineage/issues/2718#issuecomment-2134746258).
   Message consumer automatically adds a reverse symlink `Hive table → HDFS location` to simplify building lineage graph, but this is temporary solution.
 
-![dataset_symlinks.png](dataset_symlinks.png)
+![dataset symlinks](dataset_symlinks.png)
 
 ### Parent Relation
 
@@ -364,7 +364,7 @@ It contains following fields:
 - `from: Job | Run` - parent entity.
 - `to: Run | Operation` - child entity.
 
-![parent.png](parent.png)
+![parent](parent.png)
 
 ### Input relation
 
@@ -380,7 +380,7 @@ It contains following fields:
 - `num_bytes: int | None` - number of bytes read from dataset. For `granularity=JOB|RUN` it is a sum of all read bytes from this dataset. For `granularity=DATASET` always `None`.
 - `num_files: int | None` - number of files read from dataset. For `granularity=JOB|RUN` it is a sum of all read files from this dataset. For `granularity=DATASET` always `None`.
 
-![input.png](input.png)
+![input](input.png)
 
 ### Output relation
 
@@ -412,7 +412,7 @@ It contains following fields:
 
 - `num_files: int | None` - number of files written from dataset. For `granularity=JOB|RUN` it is a sum of all written files to this dataset.
 
-![output.png](output.png)
+![output](output.png)
 
 ### Direct Column Lineage relation