docs: Specification update to clean up and improve documentation for proto message definitions

[jsync-swirlds]

Massive update to all services proto files to update and correct in-place
specification and documentation.

Note, the rendered markdown is removed from this PR to ease review.
The full rendered markdown documents may be found here.

• Added svg diagrams in a branch for most state objects to assist in review.
• Cleaned up copyright headers to remove non-printing characters.
• Began reworking documents to produce clear documentation via the most
  common document processor for protobuf
  • There are limitations that encourage a slightly different style.
  • Markdown produces the best output (with slight modifications to the template),
    so that is selected.
• Added a modified markdown template (to work around the "sanitization" bug in
  the docs processor for markdown).
  • Now we can add most HTML tags in the markdown, allowing things like line breaks
    in attribute descriptions.
  • This allows using a line with only <br/> or <p> in place of blank
    lines (that break the markdown tables).
• Thorough update of many proto files in state.
• Committed a fully generated set of docs in a separate branch for review
  purposes.
• Moved document outputs to documents/api/services to allow for other document sets
• Removed unused imports to quiet warnings.
• Replicate "service" documentation to the message body entries for clarity
  • Message bodies were just "see ..." references, which do not link well,
    and push content specification to the service API, which muddies both.
• Rewrite message body documentation to content specification
• Rewrite "service" API documentation to API specification.
• Adjust common fields to have consistent descriptions.
• Updated copyright header to match services standard.
  • Corrected incorrect copy-paste of older years in some files.
  • Removed hidden zero-width characters.
  • Removed unnecessary additions.
• Adjusted query header and query response header text to be more uniform.
• Thorough update across services proto definitions
  • State messages complete
  • Consensus service complete
  • Smart Contract service complete.
  • Crypto Service complete.
  • Miscellaneous protos complete.
  • File Service complete.
  • Freeze Service complete.
  • Transaction and records complete.
  • Synthetic node_stake_update transaction complete.
  • Query and Response complete.
  • General Queries complete.
    • Harmonized crypto_get_info and get_account_details
    • Discovered no service interface defines getByKey, we may be able to
      completely remove that query, with it's handler in network admin service,
      and just reserve the field number in query and hedera functionality henceforth.
    • Found a few more unsupported queries and marked them deprecated in the
      query.proto one-of block.
  • Network Service complete
  • Schedule Service complete
  • Token Service complete
    • Fixed the new token_reject file, which was not created according to
      the content in the HIP.
  • Utility Service complete.
  • Address Book Service complete.
    • This was a separate PR.
  • Response Code
    • Separate due to size (over 360 fields) and frequent changes.
      Will be addressed in a separate PR and HIP to minimize conflict.

[jsync-swirlds]

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[Neeharika-Sompalli]

LGTM! Thanks @jsync-swirlds