* Create BDD.py

Initialize the lexer file of BDD
Add keywords of BDD

* Update the 'RegexLexer'

* Edit and test

* Update BDD.py

* Update BDD.py

* Update the BddLexer file

* Update the BddLexer of root tokens

* edit bdd

Add regular expression for tokens

* edit bdd

Add regular expression for tokens

* add .gitignore

* updata bdd.lexer

* Delete bdd.py

* Update the Keywords, Numbers, Punctuation token

* bdd.py

Assign different colors to keywords, punctuation, numbers, and variables.

* Update the BddLexer file

* Update bdd.py

Fix the file name.

* Add the detection for '@'

Co-Authored-By: OMGJL <8707895+OMGJL@users.noreply.github.com>

* Update bdd.py

Add detection of double quotes.

Co-Authored-By: OMGJL <8707895+OMGJL@users.noreply.github.com>

* Fix the double quotes

* fix the quote recognition

* add comments

* update the root dir

* add bdd test cases

* Delete .DS_Store

* Delete .DS_Store

* Delete .DS_Store

* remove DS file

* restore the gitignore file

* update the bdd lexer

* update the bdd lexer

* update the whitespace highlight

* update the whitespace highlight

* refactor the bdd.py

* update the punctuation

* update the punctuation

* update bdd token

Change "." to the "\S+",
Which reduce the test output file size.

Co-Authored-By: OMGJL <8707895+OMGJL@users.noreply.github.com>

* Update bdd.py

Reduce the new token for each space

Co-authored-by: Hongyuan Yan <hongyuan.yan@student.adelaide.edu.au>
Co-authored-by: OMGJL <lzhsjunkmail@gmail.com>
Co-authored-by: Hongyuan Yan <54675432+kirito330824@users.noreply.github.com>
Co-authored-by: Jessie2110 <71688609+Jessie2110@users.noreply.github.com>
Co-authored-by: Jessie2110 <wuqiong2110@gmail.com>
Co-authored-by: OMGJL <8707895+OMGJL@users.noreply.github.com>