refactor: use inline completion snapshots

[baszalmstra]

Adds completion relevance system and complete locals somewhat higher than non-locals.

Also contains some general refactors I stumbled upon along the way.

[codecov]

Codecov Report

Attention: Patch coverage is 69.00585% with 53 lines in your changes missing coverage. Please review.

Project coverage is 87.62%. Comparing base (8482286) to head (33e7b0a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/mun_language_server/src/to_lsp.rs	0.00%	33 Missing ⚠️
crates/mun_hir/src/primitive_type.rs	0.00%	7 Missing ⚠️
...rates/mun_language_server/src/completion/render.rs	77.77%	4 Missing ⚠️
crates/mun_hir/src/code_model/primitive_type.rs	66.66%	3 Missing ⚠️
crates/mun_language_server/src/completion/item.rs	86.95%	3 Missing ⚠️
crates/mun_hir/src/source_analyzer.rs	0.00%	1 Missing ⚠️
crates/mun_hir/src/ty/infer.rs	0.00%	1 Missing ⚠️
crates/mun_language_server/src/handlers.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #580      +/-   ##
==========================================
- Coverage   87.71%   87.62%   -0.09%     
==========================================
  Files         273      275       +2     
  Lines       32139    32228      +89     
==========================================
+ Hits        28190    28240      +50     
- Misses       3949     3988      +39     

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[Wodann]

One question. Otherwise LGTM!

[Wodann]

What does the @ symbol mean?

[baszalmstra]

its a marker for insta so it knows where to place the inline snapshot.

[Wodann]

Thanks!