Adding support for ESLint in VSCode

[haotan19]

What kind of change does this PR introduce? (check at least one)

• [x] Bugfix
• [ ] Feature
• [ ] Code style update
• [ ] Refactor
• [ ] Other, please describe:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x] No

If yes, please describe the impact and migration path for existing applications:

In VSCode with ESLint extension:

Before:

Issues #142 , no error display in VSCode.

After:

Tested on Windows 10 & macOS 12

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The PR fulfills these requirements:

• [x] It's submitted to the dev branch, not the master branch

If adding a new feature, the PR's description includes:

• [ ] A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

[haotan19]

Sometimes the ESlint extension says doesn't support the "configFile" on my Windows 10 machine, but other times it doesn't have any issues at all.

[sergejcodes]

This seems to solve the issue. I'll test it further and if no issues arise it will be implemented in the next update.

[haotan19]

The ESLint would tell me to use "overrideConfigFile": ".config/.eslintrc.js", instead of "configFile". overrideConfigFile works on my Windows 10 PC, but I am not sure it can work on my macOS (it's the same as not having a config file when using overrideConfigFile).