Add project dashboard page

[Rose-Northey]

Description

Add project dashboard page which explains how releases are selected for display on the various views of the project dashboard.
[sc-98610]

After Change

The project dashboard page was added.

It is also linked in a number of places in the docs, especially when a user may want to understand which releases will be displayed on the dashboard.

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

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[steve-fenton-octopus]

I've sent this PR through the deployment channel to staging so you can check whether it looks how you want!

http://octopus-docs-staging.s3-website-us-east-1.amazonaws.com/docs/

[steve-fenton-octopus]

Hey, there are three things on the to do list.

1. Signing the CLA
2. We use asterisk-emphasis in our markdown lint settings
3. The frontmatter on the new page needs an update

Let me know if you need help with this.

[susanpann]

Looks good! I see a few formatting changes for the better (removing excess spaces, whitespaces, etc), so let's keep those just for this pr. In src/pages/docs/administration/retention-policies/index.mdx there are a few figures where the width was removed - let's add those back in

Otherwise, great work breaking down the different views!

[steve-fenton-octopus]

Looks good! I see a few formatting changes for the better (removing excess spaces, whitespaces, etc), so let's keep those just for this pr. In src/pages/docs/administration/retention-policies/index.mdx there are a few figures where the width was removed - let's add those back in

Otherwise, great work breaking down the different views!

Hey @susanpann the new docs site doesn't use those DocSync image widths so they have no effect.

Images can't get bigger than 764px as the layout is constrained. If we need smaller images, we could create addition classes for the figure element.