Plugin Foundation

[jjgrainger]

Adds initial project files and directories.

• I've added additional files based on the Performance Lab plugin not listed in the ACs such as SECURITY.md, CODE_OF_CONDUCT.md and LICENSE
• I've also opted for the wordpress/plugin-check namespace, instead of 10up/plugin-check knowing this repo will be moved across at a later date.

Closes #1

[felixarntz]

@jjgrainger Almost LGTM, just one tiny thing, and another observation to handle separately.

[mukeshpanchal27]

Thanks @jjgrainger Left some nit-pick feedbacks

[mukeshpanchal27]

Thanks @jjgrainger Left some nit-pick feedback.

• As per the issue acceptance criteria, the folder name is tests and PR used test. which needs to be updated.

[jjgrainger]

Thanks @jjgrainger Left some nit-pick feedback.

• As per the issue acceptance criteria, the folder name is tests and PR used test. which needs to be updated.

@mukeshpanchal27 the AC actually uses tests. There is a type of test in the "Directory structure of the plugin" section of the issue. I will update this but believe that tests is correct based on what I've seen in other repo's including the Performance Lab repo.

[mukeshpanchal27]

Thanks @jjgrainger for clarification.

[mukeshpanchal27]

LGTM. Great work, @jjgrainger

[felixarntz]

Thanks @jjgrainger, LGTM!