Rest of Applications section to v2

[itowlson]

Content must go through a pre-merge checklist.

Pre-Merge Content Checklist

This documentation has been checked to ensure that:

• The title, template, and date` are all set
• Does this PR have a new menu item (anywhere in templates/*.hbs files) that points to a document .md that is set to publish in the future? If so please only publish the .md and .hbs changes in real-time (otherwise there will be a menu item pointing to a .md file that does not exist)
• File does not use CRLF, but uses plain LF (hint: use cat -ve <filename> | grep '^M' | wc -l and expect 0 as a result)
• Has passed bart check

✅ content/spin/v2/build.md
✅ content/spin/v2/running-apps.md
✅ content/spin/v2/spin-application-structure.md

• Has been manually tested by running in Spin/Bartholomew (hint: use PREVIEW_MODE=1 and run npm run styles to update styling)
• Headings are using Title Case
• Code blocks have the programming language set to properly highlight syntax and the proper copy directive
• Have tested with npm run test and resolved all errors

• Relates to an existing (potentially outdated) blog article? If so please add URL in blog to point to this content.

[tpmccallum]

LGTM

[tpmccallum]

Just added a : to the end of a paragraph (that was written by someone else, at another time). Great PR @itowlson thanks!!!

[itowlson]

Colons are my arch-nemesis, or at least an assistant junior nemesis. I will pull and squash - thanks!