Fix spelling error in Python.gitignore

Adding AWS-CDK ignore sample.

Android Studio 2020

Fix typo of Perl.gitignore

feat(terraform): adds tfvars.json to gitignore

Ignoring 3 xml files that are often modified simply by opening and testing a project.
And that only store local data.

Fix a typo: `maintainted` to `maintained`

- Remove a reminder to look at files that don't exist anymore
- Remove ignore rules for an IDE from 2007
- Remove an ignore rule for Gcc which is no longer used since 2013

Per the [Jekyll documentation](https://jekyllrb.com/tutorials/using-jekyll-with-bundler/), you should add the `vendor/` and `.bundle/` paths to the .gitignore file, so you are not managing all dependencies within your repo.

Ignore Eclipse .project and .classpath when using build tools Maven or Gradle

Create B4X.gitignore

GO: Added link to allow list template

Signed-off-by: Nkuritka <kuritka@gmail.com>