DEV: FP32 (vectorsets) should explicitly document endianness

[dwdougherty]

Fixes #1967.
Fixes #1972.

Also includes updates to the return information for the VLINKS command page.

Tests used to confirm the correct return information for the VLINKS command:

RESP2

vlinks vs element1
*1
*2
$8
element2
$8
element3
vlinks vs element1 withscores
*1
*4
$8
element2
$17
0.996941864490509
$8
element3
$3
0.5
vlinks foo
-ERR wrong number of arguments for 'VLINKS' command
vlinks vs foo
$-1
vlinks foo bar
$-1

RESP3

vlinks vs element1
*1
*2
$8
element2
$8
element3
vlinks vs element1 withscores
*1
%2
$8
element2
,0.996941864490509
$8
element3
,0.5
vlinks foo
-ERR wrong number of arguments for 'VLINKS' command
vlinks vs foo
_
vlinks foo bar
_

[github-actions]

DOC-5572

[github-actions]

Staging links:
https://redis.io/docs/staging/DOC-5572/commands/vadd/
https://redis.io/docs/staging/DOC-5572/commands/vemb/
https://redis.io/docs/staging/DOC-5572/commands/vlinks/
https://redis.io/docs/staging/DOC-5572/commands/vsim/
https://redis.io/docs/staging/DOC-5572/develop/data-types/vector-sets/

[dwdougherty]

Thank you, @cmilesb!