[SODACON 2020] Create a Call for Proposal page for SODACON 2020

[anvithks]

Issue/Feature Description:
Create a page for Call for Proposals for talks at SODACON 2020. This page will contain all the information regarding how someone can submit a proposal for speaking at SODACON 2020.

• Basic overview
• Important dates to remember
• Requirements and Considerations
• Proposal form

Why this issue to fixed / feature is needed(give scenarios or use cases):

How to reproduce, in case of a bug:

Other Notes / Environment Information: (Please give the env information, log link or any useful information for this issue)

[anvithks]

Created the CFP page. Link here