feat(editorconfig): support single quote setting in JetBrains IDEs

[niklas-wortmann]

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

The editorConfig generated by ng new specified quote_type = single for ts files. This is not a valid configuration option within editorConfig, instead editor could use it, but AFAIK no one utilizes this (editorconfig/editorconfig-vscode#95). JetBrains IDEs have the option with the ij_ prefix to set custom settings, and ij_use_double_quote=false will lead to autogenerated code (e.g. autoimports) to use single quotes

Issue Number: N/A

What is the new behavior?

JetBrains IDEs will use single quotes by default

Does this PR introduce a breaking change?

• Yes
• No

[alan-agius4]

LGTM, can you fix the commit message type and scope to the below please?

fix(@schematics/angular):

Thanks.

[niklas-wortmann]

done, thanks!

[alan-agius4]

LGTM, thanks for your contribution.

[clydin]

The changes were merged into the following branches: main, 18.2.x

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