Redo of #926 and #943 because I messed up the history again -_-

Please specify parts of this PR update:

• Specification
• Schema
• Examples
• Extensions
• Use Cases
• Community
• CTK
• Other

Discussion or Issue link:
Closes #917 (and other little minor typo)

What this PR does:

• Fixes inconsistencies between listen and emit
  • Added new event section in the specification documentation
  • Fixed the sample of emit in the specification documentation
  • Added new event definition in the JSON schema and referenced it in emit.event.with and eventFilter.with
• Fixes a typo in the set feature
• Fixed type of an http call endpoint by adding string
• Added new (missing) endpoint section in the specification documentation
• Escaped * character
• Fixed double https://https://
• Fixed links to runtime expressions
• Fixed typo in implictly

Additional information:
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