Move from specs to salsa

[dflemstr]

[codecov[bot]]

Codecov Report

Merging #2 into master will decrease coverage by 1.28%. The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master       #2      +/-   ##
==========================================
- Coverage   71.32%   70.03%   -1.29%     
==========================================
  Files          39       39              
  Lines        4593     4389     -204     
==========================================
- Hits         3276     3074     -202     
+ Misses       1317     1315       -2

Impacted Files	Coverage Δ
src/error.rs	0% <ø> (-57.9%)	:arrow_down:
src/syntax/ast/map_context.rs	94.4% <ø> (ø)
src/ir/tests.rs	100% <ø> (ø)	:arrow_up:
src/ir/mod.rs	98% <ø> (ø)	:arrow_up:
src/codegen/tests.rs	100% <ø> (ø)	:arrow_up:
src/lib.rs	0% <0%> (ø)	:arrow_up:
src/syntax/parser/mod.rs	86.19% <100%> (ø)
src/ir/builder.rs	88.23% <100%> (+19.06%)	:arrow_up:
src/syntax/parser/util.rs	58.52% <100%> (ø)
src/syntax/ast/mod.rs	41.76% <42.1%> (ø)
... and 6 more

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