Add common error section, add SFDC tasks section, add template for exemption , remove other section, associated updates

This MR

• Adds a common error section with associated fixes
• Adds a common SFDC tasks section
• Removes the other sections and moves the misc. content to the appropriate section
• Adds a workflow and email template for making exemptions to the one-license-per-institute policy
• A few misc. adjustments

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what