Additional samples for the 000 level syntax examples

[ChristopherGLewis]

Additional syntax samples

• 10-string-functions
• 11-multiline-strings
• 20-array-loop
• 21-array-lookup
• 22-array-lookup-complex
• 30-json-object-simple
• 31-json-object-complex

Contributing an example

• I have checked that there is not an equivalent example already submitted
• I have resolved all warnings and errors shown by the Bicep VS Code extension
• I have checked that all tests are passing by running dotnet test
• I have consistent casing for all of my identifiers and am using camelCasing unless I have a justification to use another casing style

[alex-frankel]

These are great! The array and object ones in particular are very clean and taught me a few things :)

Just a small tweak on string interpolation

[anthony-c-martin]

Wow, this is very cool to see! Thanks very much for this awesome contribution!