add documentation for from-json, from-yaml, history, split-row

docs/commands/from-json.md

@@ -0,0 +1,33 @@
+# from-json
+
+Parse text as `.json` and create table. Use this when nushell cannot dertermine the input file extension.
+
+Syntax: `from-json {flags}`
+
+### Flags:
+
+    --objects
+      treat each line as a separate value
+
+
+## Examples
+
+```shell
+> open command_from-json
+[
+    {
+        title: "from-json",
+        type: "command",
+        flags: true
+    }
+]
+```
+
+```shell
+> open command_from-json | from-json
+━━━━━━━━━━━┯━━━━━━━━━┯━━━━━━━
+ title     │ type    │ flags 
+───────────┼─────────┼───────
+ from-json │ command │ Yes 
+━━━━━━━━━━━┷━━━━━━━━━┷━━━━━━━
+```