Add full skill set: 28 SKILL.md files + master bundle + registry

Put 02-data-extraction/text-cleaner/SKILL.md

Put 02-data-extraction/ner/SKILL.md

Put 02-data-extraction/date-parser/SKILL.md

Put 02-data-extraction/amount-parser/SKILL.md

Put 02-data-extraction/transaction-parser/SKILL.md