feat: InputNotSorted lint rule

[adthrasher]

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

• Rule Name: InputNotSorted

Implements a rule to ensure that input declarations are sorted based on our opinionated sort.

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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 cases in wdl-lint/tests/lints that covers every
  possible diagnostic emitted for the rule within the file where the rule
  is implemented.
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  unintended changes to the baseline configuration file (Gauntlet.toml).
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  rules added/removed are now reflected in the baseline configuration file
  (Arena.toml).