cli: add \x command to toggle records display format

[erikgrinaker]

psql has a \x command to toggle extended output for results. CRDB
already supports this output format via \set display_format=records.
This commit adds \x [on|off] to toggle between records and table
display formats.

The auto option from psql to automatically enable extended output
depending on the result width is not supported, only on and off.

Resolves #56706.

Release note (cli change): A \x [on|off] command has been added to
toggle the records display format, following psql behavior.

Also adds support for yes and no as boolean options for slash commands as a separate commit, following psql.

[blathers-crl]

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[cockroach-teamcity]

This change is 

[knz]

Hi Eric, glad to see your contribution!

Reviewed 2 of 2 files at r1.
Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @erikgrinaker)

---

pkg/cli/sql.go, line 318 at r1 (raw file):

			val = strings.ToLower(strings.TrimSpace(val))
			switch val {
			case "false", "0", "off":

then reuse it here

---

pkg/cli/sql.go, line 489 at r1 (raw file):

		err = opt.set(val)
	} else {
		switch val {

Can you extract this boolean parsing code into a reusable function

---

pkg/cli/sql.go, line 1181 at r1 (raw file):

		case 2:
			switch strings.TrimSpace(strings.ToLower(cmd[1])) {
			case "on", "1", "true":

and also here

thanks

[blathers-crl]

Thank you for updating your pull request.

Before a member of our team reviews your PR, I have some potential action items for you:

• We notice you have more than one commit in your PR. We try break logical changes into separate commits, but commits such as "fix typo" or "address review commits" should be squashed into one commit and pushed with --force
• When CI has completed, please ensure no errors have appeared.

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[erikgrinaker]

Sure @knz, done! Also added support for yes and no for boolean options, since psql already does this. Split it out as a separate commit.

[knz]

thanks

Reviewed 3 of 4 files at r2, 2 of 2 files at r3.
Reviewable status: complete! 1 of 0 LGTMs obtained

[erikgrinaker]

Could you ask bors to merge this please?

[knz]

bors r+

[craig]

Build succeeded:

• GitHub CI (Cockroach)