feat(solc): optimize output selection in cache mode

[mattsse]

Motivation

Closes #1009

Solution

only select output for files that are actually dirty and select nothing for other files that are pulled in by dirty files.

Some preliminary testing on https://github.com/maple-labs/loan/releases/tag/v3.0.0-beta.0

cached and modified MapleLoan.t.sol:

with this PR:

❯ ../../../foundry/target/release/forge build                                                                                                         ! tags/v3.0.0-beta.0 
[⠢] Compiling...
[⠑] Compiling 30 files with 0.8.7
Compiler run successful (with warnings)
../../../foundry/target/release/forge build  6.64s user 0.32s system 99% cpu 6.990 total

note the 30 files are 1 dirty + 29 imported. There's currently no easy way to fix this as the total number of source files in the CompilerInput is reported

current master

❯ forge build                                                                                                                                              ! tags/v3.0.0-beta.0 
[⠢] Compiling...
[⠒] Compiling 1 files with 0.8.7
Compiler run successful (with warnings)
forge build  10.13s user 0.40s system 96% cpu 10.924 total

Todo

• additional tests
• more caching docs

PR Checklist

• Added Tests
• Added Documentation
• Updated the changelog

[gakonst]

so far so good - excited about this, will be even better on larger repos

[gakonst]

nit formatting here prob pretty print better