`docs:` complete integration docs section

[ayaankhan98]

Tasks

• introductory section about integration. #17
• complete jira section (explain basic terminology if required, how to integrate, how to create issues for failed test cases, how to view issues, what are the potential issue that could arise when integrating jira) #18
• complete email section (same as above) #19
• TOTP section #20
• complete github integration documentation #26