Write developer docs

[connorcarnes]

Description

• explain dev environment and common patterns in project
  • use of types.ps1xml
  • arguement completers
  • Function naming convention: Get-CloudflareResource with alias Get-CFResource
  • specific on parameter names from this link (e.g. Get-Account should havhe -Name parameter and the parameter should have an alias of AccountName) https://learn.microsoft.com/en-us/powershell/scripting/developer/cmdlet/strongly-encouraged-development-guidelines?view=powershell-7.4#use-standard-parameter-names
• write doc that walks someone through the process of setting up dev env and making PR start to finish.
• use of comments
• handling get and list endpoints as one function