Create a chapter on Book Dash (for the community handbook)

[malvikasharan]

Summary

Fixes #848

• This PR creates a new chapter with multiple subchapters on The Turing Way Book Dash

List of changes proposed in this PR (pull-request)

• Create a landing page for the chapter
• 3 subchapters: 1) application and review, 2) selection and preparation, 3) main events
• 4 templates: 1) issue checklist for preparation, 2) pre-event call's template, 3) main event notes template, 4) feedback template

What should a reviewer concentrate their feedback on?

• Captures all details
• Includes all the references
• Reviewers can ignore template review to avoid overburdening themselves
• Everything looks ok?

Acknowledging contributors

• All contributors to this pull request are already named in the table of contributors in the README file.
• The following people should be added to the table of contributors in the README file:

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[malvikasharan]

Thank you @ArielleBL for the review and thoughful comments. I am integrating changes and will work on restructuring based-on two comments (schedule and scorint). 🎉🙌

[malvikasharan]

Integrated suggestions made by @ArielleBL 💃

[ArielleBL]

A great chapter! Really comprehensive and clear. Have identified some small typos and one paragraph swap but otherwise this is good to go!

[malvikasharan]

Thanks @ArielleBL for the reviews. I have integrated the changes and did another round of spellcheck to be sure. Let me know if this could be approved. 🎉

[ArielleBL]

Hooray looks all good to go to me @malvikasharan