Created a doc folder, moved project banner to folder

[Pipe-Runner]

fixes #253

• Please check if the PR fulfils these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• Bug fix
• Feature implementation
• Doc updates

• What changes have you introduced?

• Created a separate doc folder
• Moved project banner image in doc folder

• Does this PR introduce a breaking change?
  No

[Pipe-Runner]

@mariobehling Sir, I have addressed the image issue. 👍