いくつか気になった箇所を改修

[jacoyutorius]

ジェネレーターを改修。

• パスワードに利用するFakerのカテゴリーを増やした
• 単語の一部の文字を大文字に変換した
• 数値が末尾だけでなく、ランダムな位置に配置されるようにした

[Copilot]

Pull Request Overview

This PR enhances the Passfaker generator by expanding word sources, introducing random uppercase transformations, and allowing numbers to appear at arbitrary positions.

• Added new Faker categories for password components
• Implemented random_char_upcase to uppercase one character per word
• Changed number insertion and ordering, and bumped version to 0.2.0

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
spec/passfaker_spec.rb	Updated the regex to detect digits anywhere in the password
lib/passfaker/version.rb	Bumped VERSION from 0.1.0 to 0.2.0
lib/passfaker/generator.rb	Added new Faker categories, removed internal dashes, uppercased a random char, shuffled words & numbers

Comments suppressed due to low confidence (1)

lib/passfaker/generator.rb:32

• The new random_char_upcase method introduces behavior that isn’t currently exercised by any spec. Consider adding a test to verify that exactly one character is randomly converted to uppercase.

    def self.random_char_upcase(word)