Add SQLCipher support #72

[dioKaratzas]

Resolves: #72

Blocked till Swift 6.2 release

Summary:

• Added SQLCipher plugin with build configuration
• Added CSQLCipher module with headers and sources
• Added conditional compilation for SQLCipher vs SQLite
• Added [email protected] for Swift 6.2 support

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 72.06%. Comparing base (a4c62fa) to head (d441812).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   72.06%   72.06%           
=======================================
  Files          10       10           
  Lines        1013     1013           
=======================================
  Hits          730      730           
  Misses        283      283           

Files with missing lines	Coverage Δ
Sources/SQLiteNIO/SQLiteConnection+Hooks.swift	91.02% <ø> (ø)
Sources/SQLiteNIO/SQLiteConnection.swift	69.91% <ø> (ø)
Sources/SQLiteNIO/SQLiteCustomFunction.swift	82.63% <ø> (ø)
Sources/SQLiteNIO/SQLiteData.swift	75.00% <ø> (ø)
Sources/SQLiteNIO/SQLiteDatabase.swift	33.33% <ø> (ø)
Sources/SQLiteNIO/SQLiteError.swift	49.25% <ø> (ø)
Sources/SQLiteNIO/SQLiteStatement.swift	95.50% <ø> (ø)

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