* spark-based commitments to R1CS matrices

* small fixes

* checkpoint

* simplify further

* checkpoint

* gens --> ck

* update benches

* address clippy

* cleanup

* update version

make spartan generic over the evaluation engine

update version

disable Wasm CI check

* Clippy with Rust 1.67

* Clippy/Rustfmt with Rust 1.66.1

use a macro to remove redundant code

add a test case

* make ecc gadgets defined over Group rather than PrimeField

* use curve parameters from Group trait

* support for arbitrary arity for F

* revive MinRoot example

* revive tests

* revive ecdsa

* remove unused code

* use None instead of Some(1u32)

* revive benches

* fix clippy warning

* optimize MinRoot constraint system to not allocate unneeded advice variables

run with multiple MinRoot iterations per Nova step in a loop

* fix clippy warnings

* avoid creating commitments to zero vectors

* reduce the number of constraints in each iteration from 4 to 3

* rename methods for better clarity

* rename

* Bump version

* ecdsa signature proof

* use the library-provided default circuit

* small reorg

Co-authored-by: Srinath Setty <srinath@microsoft.com>

use a default implementation for step circuit

* support multiple iterations of MinRoot per Nova step

* small edits to println

* fix declaration

* add the MinRoot VDF example

* optimize a bit

* optimization and cleanup

* clippy

* add examples to CI

* use inbuilt pow_vartime