Merge pull request #790 from mfarberbrodsky/add-nth-docs

Add documentation for nth command

docs/commands/nth.md

@@ -0,0 +1,31 @@
+# nth
+
+This command returns the nth row of a table, starting from 0.  
+If the number given is less than 0 or more than the number of rows, nothing is returned.
+
+## Usage
+```shell
+> [input-command] | nth [row-number]
+```
+
+## Examples
+```shell
+> ls
+━━━┯━━━━━━━━━━━━┯━━━━━━━━━━━┯━━━━━━━━━━┯━━━━━━━━┯━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━━━
+ # │ name       │ type      │ readonly │ size   │ accessed      │ modified 
+───┼────────────┼───────────┼──────────┼────────┼───────────────┼───────────────
+ 0 │ Cargo.toml │ File      │          │ 239 B  │ 2 minutes ago │ 2 minutes ago 
+ 1 │ .git       │ Directory │          │ 4.1 KB │ 2 minutes ago │ 2 minutes ago 
+ 2 │ .gitignore │ File      │          │  19 B  │ 2 minutes ago │ 2 minutes ago 
+ 3 │ src        │ Directory │          │ 4.1 KB │ 2 minutes ago │ 2 minutes ago 
+━━━┷━━━━━━━━━━━━┷━━━━━━━━━━━┷━━━━━━━━━━┷━━━━━━━━┷━━━━━━━━━━━━━━━┷━━━━━━━━━━━━━━━
+
+> ls | nth 0
+━━━━━━━━━━━━┯━━━━━━┯━━━━━━━━━━┯━━━━━━━━┯━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━━━
+ name       │ type │ readonly │ size   │ accessed      │ modified 
+────────────┼──────┼──────────┼────────┼───────────────┼───────────────
+ Cargo.toml │ File │          │ 239 B  │ 2 minutes ago │ 2 minutes ago 
+━━━━━━━━━━━━┷━━━━━━┷━━━━━━━━━━┷━━━━━━━━┷━━━━━━━━━━━━━━━┷━━━━━━━━━━━━━━━
+
+> ls | nth 5
+```