Improve documentation consistency

[Copilot]

Standardize Haddock documentation across the codebase to consistently end with periods and fix various typos discovered during the review.

Documentation Consistency

• Added trailing periods to all module-level, function-level, type-level, and field-level Haddock comments

Typo Fixes

• possition → position
• moslty → mostly
• whithin → within
• determinstically → deterministically
• acceptec → accepted
• prunning → pruning
• fullfilling → fulfilling
• constraning → constraining
• Abtract → Abstract
• patter → pattern
• indefinetely → indefinitely

Example

Before:

-- | Configuration options for Mutagen
module Test.Mutagen.Config

-- | Breadcrumbs used to place mutations inside of values
type Pos = [Int]

After:

-- | Configuration options for Mutagen.
module Test.Mutagen.Config

-- | Breadcrumbs used to place mutations inside of values.
type Pos = [Int]

Original prompt

Improve the documentation of this package, paying special attention to consistency (e.g, periods)

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