Improved performance of codec initialization

[jorgecarleitao]

Removes an un-needed allocation when initializing a codec.

backward incompatible changes

To migrate:

Code such as

let mut codec = create_codec(compression)?;
codec.decompress(...)?
// or
codec.compress(...)?

use

compression::decompress(compression, ...)
compression::compress(compression, ...)

which does not require a boxed trait object.

[codecov-commenter]

Codecov Report

Merging #63 (5c4e3b1) into main (7fbf8e4) will decrease coverage by 0.14%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main      #63      +/-   ##
==========================================
- Coverage   66.52%   66.38%   -0.15%     
==========================================
  Files          65       65              
  Lines        3594     3567      -27     
==========================================
- Hits         2391     2368      -23     
+ Misses       1203     1199       -4     

Impacted Files	Coverage Δ
src/write/compression.rs	0.00% <0.00%> (ø)
src/read/compression.rs	56.33% <55.55%> (-0.81%)	⬇️
src/compression.rs	88.57% <78.37%> (+1.07%)	⬆️
src/page/page_dict/mod.rs	52.63% <100.00%> (-2.37%)	⬇️

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