Support 'and' as a Bible verse list delimiter

[cguldner]

Motivation

• Users often write verse lists using the word and (case-insensitive) as the final delimiter, so the parser should recognize it and preserve the original text when converting references to links.
• The change aims to be clean and modular by centralizing the delimiter logic and reusing it for both parsing and link rendering.

Description

• Introduced a centralized delimiter regex and parser in js/verseParser.mjs by adding VERSE_LIST_DELIMITER_REG and updating splitVerseListString to recognize and and preserve delimiters.
• Refactored regex construction in js/biblePreviewer.js into a buildBibleRegex() helper and extended list continuation matching to include and, and updated the reference rendering to use splitVerseListString so original delimiters (commas, semicolons, and and) are preserved.
• Added unit tests in js/verseParser.test.mjs for and and mixed delimiter cases to validate parsing behavior.
• Added Cypress fixture and E2E assertions (cypress/test.html and cypress/e2e/link_creation.cy.js) to cover and-separated same-book lists, chapter-context carryover, and delimiter-preservation.

Testing

• Ran unit tests with npm test, and all tests passed successfully.
• Ran linter with npm run lint, which completed without errors.
• Attempted npm run cypress:run, but Cypress failed in this environment due to a missing system dependency (Xvfb), so E2E tests could not be executed here; the new Cypress tests are included and will run in a CI or developer environment with required GUI dependencies installed.

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Codex Task