feat(db): Add libmdbx-rs apache licenced code 55e234

[rakita]

Added Apache version of libmdbx-rs (commit: 55e234) from https://github.com/vorot93/libmdbx-rs.

This pull request is here to just include the code in a clean way, next pull request will use the lib and update mdbx-sys.

[codecov]

Codecov Report

Merging #132 (c17ab81) into main (0998fc3) will increase coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #132      +/-   ##
==========================================
+ Coverage   70.98%   71.11%   +0.13%     
==========================================
  Files         140      140              
  Lines        9361     9386      +25     
==========================================
+ Hits         6645     6675      +30     
+ Misses       2716     2711       -5     

Impacted Files	Coverage Δ
crates/db/src/kv/cursor.rs	27.38% <0.00%> (-0.33%)	⬇️
crates/db/src/kv/mod.rs	93.45% <0.00%> (+0.55%)	⬆️
crates/interfaces/src/db/container.rs	52.94% <0.00%> (+1.51%)	⬆️
crates/interfaces/src/db/codecs/fuzz/mod.rs	86.66% <0.00%> (+2.05%)	⬆️
crates/interfaces/src/db/mod.rs	69.69% <0.00%> (+5.80%)	⬆️
crates/interfaces/src/db/models/blocks.rs	94.33% <0.00%> (+9.72%)	⬆️

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[mattsse]

lgtm,

next step is then to replace crate dependencies?