Bolt-boost module

[mempirate]

Context

This PR implements a new commit-boost module with the constraints-API.

Closes #90

[thedevbirb]

First round of review! Great work, going to take a better look at the server.rs, types.rs files later

[merklefruit]

Great work, left mostly questions to understand the entire flow

[merklefruit]

One last nit: we're using standardized rustfmt rules across our packages, can you apply them to this one too?
it's just a new file rustfmt.toml:

reorder_imports = true
imports_granularity = "Crate"
use_small_heuristics = "Max"
comment_width = 100
wrap_comments = true
binop_separator = "Back"
trailing_comma = "Vertical"
trailing_semicolon = false
use_field_init_shorthand = true
format_code_in_doc_comments = true
doc_comment_code_block_width = 100

then we can use auto-formatting with LSPs and cargo fmt --all to do it manually.

[thedevbirb]

A couple of q's on the server code