Update filter.js to clean matching whole word

[sriram-Ghub]

created new method "cleanWholeWord" to always replace whole matching profanity word in a sentence against the profanity dictionary.

[sriram-Ghub]

Going by the filter.js what i see after installing the node package, the module performs matching for profanity words in a case-sensitive manner. However, I've noticed that this approach may overlook instances where profanity words are not in the expected case.

Additionally, the module replaces profanity words regardless of whether they appear as whole words or as part of a larger word. This behaviour may lead to unintended replacements in cases where a profanity word is part of another word.

To address these concerns, I propose two enhancements with my new method cleanWholeWord()

Case-Insensitive Matching: Adding case-insensitive matching to the profanity filter would ensure that the filter captures all variations of the profanity words, regardless of their case.

Whole Word Matching: Limiting replacements to instances where profanity words appear as whole words would prevent unintended replacements when profanity words are part of larger words.