[feature] #2434: FFI bindgen library

[mversic]

Signed-off-by: Marin Veršić [email protected]

Description of the Change

I've found that often times I need to traverse the type and produce conversions from source to FFI compliant type and vice versa.
There have been a lot of code duplication and convoluted logic which this PR aims to resolve

Traits which enable this happen: ReprC, AsReprC, TryFromReprC IntoFfi. A Rust structure is converted into an intermediary FFI struct via IntoFfi which implements the AsReprC and can be converted into a type that can cross FFI boundary. This goes the other way as well - FFI ReprC type is converted into a struct via TryFromReprC

• 1st rule of this lib - there is no ownership transfer except for opaque pointer types
• Added catch_unwind to prevent UB when panicking over FFI

Issue

Closes #2327

Benefits

Possible Drawbacks

Usage Examples or Tests [optional]

Alternate Designs [optional]

[codecov]

Codecov Report

Merging #2314 (586d59a) into iroha2-dev (a16d9c3) will decrease coverage by 0.83%.
The diff coverage is 60.38%.

@@              Coverage Diff               @@
##           iroha2-dev    #2314      +/-   ##
==============================================
- Coverage       67.61%   66.77%   -0.84%     
==============================================
  Files             140      145       +5     
  Lines           26173    27150     +977     
==============================================
+ Hits            17696    18130     +434     
- Misses           8477     9020     +543     

Impacted Files	Coverage Δ
actor/src/broker.rs	88.05% <ø> (ø)
client/src/client.rs	45.33% <0.00%> (-0.99%)	⬇️
core/src/smartcontracts/isi/asset.rs	54.82% <ø> (ø)
core/src/smartcontracts/isi/mod.rs	56.77% <ø> (+3.90%)	⬆️
core/src/smartcontracts/isi/triggers.rs	0.00% <0.00%> (ø)
core/src/wsv.rs	83.17% <ø> (+0.92%)	⬆️
data_model/src/events/execute_trigger.rs	7.40% <ø> (ø)
data_model/src/metadata.rs	90.08% <0.00%> (ø)
data_model/src/predicate.rs	99.79% <ø> (-0.01%)	⬇️
data_model/src/role.rs	6.57% <0.00%> (-0.37%)	⬇️
... and 62 more

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