feat: add disallowed input and output name rules

[adthrasher]

This pull request adds a new rule to wdl-lint.

• Rule Name: DisallowedInputName
• Rule Name: DisallowedOutputName

These rules check for prefixes of input and output declarations. They also enforce three or more characters for the declaration identifiers.

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Rule specific checks:

• You have added the rule as an entry within RULES.md.
• You have added the rule to the rules() function in wdl-lint/src/lib.rs.
• You have added a test case in wdl-lint/tests/lints that covers every
  possible diagnostic emitted for the rule within the file where the rule
  is implemented.
• If you have implemented a new Visitor callback, you have also
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  (wdl-ast/src/validation.rs) and LintVisitor
  (wdl-lint/src/visitor.rs) visitors. These are required to ensure the new
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• You have run wdl-gauntlet --refresh to ensure that there are no
  unintended changes to the baseline configuration file (Gauntlet.toml).
• You have run wdl-gauntlet --refresh --arena to ensure that all of the
  rules added/removed are now reflected in the baseline configuration file
  (Arena.toml).