Spellcheck False Alarms - Soft Hyphens

### Apache NetBeans version

Apache NetBeans 15

### What happened

The spell checker incorrectly flags as misspelled words with embedded soft hyphens (U+00AD). We have tens thousands of these in our site, but NetBeans' spell check is the first one to report these words were misspelled.

Spell checker should ignore soft hyphens.

### How to reproduce

Spellcheck false alarms happen 100% of the time.

Example: The word **Net­Beans** has a soft hyphen after the 't.' Paste it into a Web page with spell checking enabled.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Windows 10 Home, version 21H2, OS build 19044.2130, Windows Feature Experience Pack 120.2212.4180.0,Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz

### JDK

java version "18.0.2" 2022-07-19 Java(TM) SE Runtime Environment (build 18.0.2+9-61) Java HotSpot(TM) 64-Bit Server VM (build 18.0.2+9-61, mixed mode, sharing)

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

Product Version: Apache NetBeans IDE 15
Java: 18.0.2; Java HotSpot(TM) 64-Bit Server VM 18.0.2+9-61
Runtime: Java(TM) SE Runtime Environment 18.0.2+9-61
System: Windows 10 version 10.0 running on amd64; UTF-8; en_US (nb)

### Are you willing to submit a pull request?

No

### Code of Conduct

Yes

No source file or test is named. First reproduce the false alarm in Apache NetBeans 15 by pasting the provided “Net­Beans” example into a Web page with spell checking enabled, then locate the spell-checker implementation and its tests. Done means words containing U+00AD are no longer reported as misspelled.

Written by the indexing model from the issue text.