All TypeScript files have been updated to pass the new eslint-based linting checks. eslint compatible disabling comments have also been added in place of the previous tslint comments.
Reading throw #16034 the angular config should be placed in the
`$XDG_CONFIG_HOME/angular/` directory, but if the environmental variable
$XDG_CONFIG_HOME is set the first check of `xdgConfigHome` function will
only put it in the `$XDG_CONFIG_HOME` directory. Also renamed the config
file from `.angular-config.json` to `config.json` when it is in the
`~/.config/angular` directory since it doesn't need to be hidden.
Previously, the workspace configuration file was found and loaded by individual commands potentially multiple times. This change moves the initial workspace location discovery and loading of the workspace to the CLI startup. It also provides the workspace to each command so that the commands can reuse the already loaded and parsed workspace configuration.
Explained here: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
Current change affects reading of global config from `.angular-config.json`. By default it will be created in user's home directory. If user moves it manually to `$HOME/.config/angular/.angular-config.json`, it will be subsequently read from new location.
Angular 5.0+ has a full peer dependencies setup (with 6.0+ also having a configurable runtime error check) to ensure that an appropriate version of typescript is available for compilation. Angular CLI 8.0+ does not support Angular versions prior to these and therefore the warning is redundant. For the case where the developer wishes to use an unsupported TypeScript version, the developer would need to adjust two similar but differently name settings in two different configuration files.
This should clean up the code a bit.
Note: at first I added the no-useless-cast rule, but after getting frustrated
with it (as it has many false positive), I decided to remove the rule but some
useless casts were removed so I let those in the PR.
