Moves generated images into dist/webviews/media

For upcoming premium features

Improves DOM methods

It is a large dependency, that isn't needed for our use of node-fetch

Consolidates to node-fetch 2.6.7 as Octokit requires v2

Moves eslint ignores into rc file
 Removes unused dev dependency

Adds image minify webpack config for debugging

Reorganizes local git support to exclude from web
Swaps sha1 usages to md5 to avoid needing sha1 on the web (md5 is required by Gravatar)
Avoids crypto-browserfy and imports md5.js directly
Uses platform crypto for random nonce strings

Avoids process.hrtime for web builds

This is to ultimately will support virtual repositories (without git)

Adds anti-trojan-source eslint rule
Improves typescript config for eslint import

Switches to use new context.extension

Tidies webpack cli output