fix: Fix #15

[melck]

This commit fix issue #15 and have following changes:

• Change tsconfig.json to vscode sample recommendations
• Remove 'use strict' because of changes tsconfig.json file
• Fix typescript warning for src/scripts/* files
• Add setting base16.generator.activatedThemes
• Fix commands to use setting
• Add check setting at start and activate themes if needed
• Change activate command to support order of activated themes if manually changed in settings
• Add observer on settings change to activate themes

What do you think about this changes? It will save some time when i use a devcontainer, remote ssh, or updating extension.

[melck]

Hello @golf1052 ,

What do you think about this changes ?

[golf1052]

Sorry it took *looks at watch* a year to merge this change in but thanks for the change!