Make the subcommands (from {csv, tsv, ssv}) 0-based for consistency (#13209)

# Description

fixed #11678

The sub-commands of from command (`from {csv, tsv, ssv}`) name columns
starting from index 0.
This behaviour is inconsistent with other commands such as `detect
columns`.
This PR makes the subcommands index 0-based.

# User-Facing Changes

The subcommands (`from {csv, tsv, ssv}`) return a table with the columns
starting at index 0 if no header data is passed.

```
~/Development/nushell> "foo bar baz" | from ssv -n -m 1 
╭───┬─────────┬─────────┬─────────╮
│ # │ column0 │ column1 │ column2 │
├───┼─────────┼─────────┼─────────┤
│ 0 │ foo     │ bar     │ baz     │
╰───┴─────────┴─────────┴─────────╯
~/Development/nushell> "foo,bar,baz" | from csv -n 
╭───┬─────────┬─────────┬─────────╮
│ # │ column0 │ column1 │ column2 │
├───┼─────────┼─────────┼─────────┤
│ 0 │ foo     │ bar     │ baz     │
╰───┴─────────┴─────────┴─────────╯
~/Development/nushell> "foo\tbar\tbaz" | from tsv -n
╭───┬─────────┬─────────┬─────────╮
│ # │ column0 │ column1 │ column2 │
├───┼─────────┼─────────┼─────────┤
│ 0 │ foo     │ bar     │ baz     │
╰───┴─────────┴─────────┴─────────╯
```


# Tests + Formatting

When I ran tests, `commands::touch::change_file_mtime_to_reference`
failed with the following error.
The error also occurs in the master branch, so it's probably unrelated
to these changes.
(maybe a problem with my dev environment)

```
$ toolkit check pr

~~~~~~~~

failures:

---- commands::touch::change_file_mtime_to_reference stdout ----
=== stderr

thread 'commands::touch::change_file_mtime_to_reference' panicked at crates/nu-command/tests/commands/touch.rs:298:9:
assertion `left == right` failed
  left: SystemTime { tv_sec: 1719149697, tv_nsec: 57576929 }
 right: SystemTime { tv_sec: 1719149697, tv_nsec: 78219489 }


failures:
    commands::touch::change_file_mtime_to_reference

test result: FAILED. 1533 passed; 1 failed; 32 ignored; 0 measured; 0 filtered out; finished in 10.87s

error: test failed, to rerun pass `-p nu-command --test main`
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🔴 `toolkit test`
- ⚫ `toolkit test stdlib`
```

# After Submitting

nothing

crates/nu-command/tests/format_conversions/csv.rs

@@ -284,7 +284,7 @@ fn from_csv_text_skipping_headers_to_table() {
             r#"
                 open los_tres_amigos.txt
                 | from csv --noheaders
-                | get column3
+                | get column2
                 | length
             "#
         ));

crates/nu-command/tests/format_conversions/ssv.rs

@@ -74,7 +74,7 @@ fn from_ssv_text_treating_first_line_as_data_with_flag() {
                 open oc_get_svc.txt
                 | from ssv --noheaders -a
                 | first
-                | get column1
+                | get column0
             "#
         ));
 
@@ -84,7 +84,7 @@ fn from_ssv_text_treating_first_line_as_data_with_flag() {
                 open oc_get_svc.txt
                 | from ssv --noheaders
                 | first
-                | get column1
+                | get column0
 
             "#
         ));

crates/nu-command/tests/format_conversions/tsv.rs

@@ -207,7 +207,7 @@ fn from_tsv_text_skipping_headers_to_table() {
             r#"
                 open los_tres_amigos.txt
                 | from tsv --noheaders
-                | get column3
+                | get column2
                 | length
             "#
         ));