* move encoding.ts to common for #79275
* load iconv-lite-umd and jschardet in web version for #79275
* move EncodingOracle to the AbstractTextFileService for #79275
* review
* update to new iconv-lite-umd
* add workaround for jschardet types
* fix indentation
* add iconv-lite-umd and jschardet to workbench.html
* fix paths for modules
Co-authored-by: Benjamin Pasero <benjpas@microsoft.com>