feat: add support of eslint and typescript, plus more tests and exception handlings

[modesty]

• eslint is configured and enabled
• typescript is configured and part of build
• updated pdfparser.d.ts with more types
• previous lib/p2jcmd*.js are replaced with src/cli/p2jcli*.ts
• previous root/pdf2json.js is removed, favor bin/pdf2json.js
• Jest test's Page content are validated with test/data/xxx.json
• address the following issues and also added associated test PDFs: ** #343 ** #321 ** #318 ** #277 ** #262 ** #255