enhance(regex): improve IP extractor to prevent false positives and enforce IPv4 octet ranges

Tighten IPv4 pattern to enforce 0-255 per octet, rejecting invalid addresses like 256.256.256.256 and 999.999.999.999

Replace loose IPv6 matcher with comprehensive pattern covering full, compressed, link-local with zone IDs, and IPv4-embedded forms

Author: Pratyush2240

Specialized Areas/Regular Expressions/IP Address Validation/README.md

@@ -1,4 +1,6 @@
-The regex in `getIP4OrIPV6address.js` validates both IPv4 and IPv6 addresses in input text.
+This snippet extracts IPv4 and IPv6 addresses from free text. For single-value validation, see `validateIPInput.js` and `Validate IPv6 Address/script.js`.
+
+The regex in `getIP4OrIPV6address.js` finds both IPv4 and IPv6 addresses within arbitrary text content.
 
 IPv6 coverage includes:
 - Full addresses like `2001:0db8:85a3:0000:0000:8a2e:0370:7334`

Specialized Areas/Regular Expressions/IP Address Validation/getIP4OrIPV6address.js

@@ -1,3 +1,5 @@
+// Extracts IPv4 and IPv6 addresses from arbitrary text content
+// For single-value validation, use validateIPInput.js or Validate IPv6 Address/script.js
 extractIPAddresses: function(text) {
         var ipv4 = "(?:25[0-5]|2[0-4]\\d|1?\\d?\\d)(?:\\.(?:25[0-5]|2[0-4]\\d|1?\\d?\\d)){3}";
         var ipv6 = "("+