Remove dependency on solidity-stringutils

[ericglau]

• Remove dependency on solidity-stringutils. Instead, uses a combination of OpenZeppelin's Strings library, Forge's string cheatcodes, and an internal library for additional string finder functions.
• Sets the assembly block in Core._deployFromBytecode as /// @solidity memory-safe-assembly. This annotation is used instead of assembly ("memory-safe") so that it remains compatible with versions of Solidity used in both OpenZeppelin Contracts v4 and v5.

Fixes #89

[Amxx]

I'm thinking that there may be stuff from solidity-stringutils that we want to put in our String.sol

[tomw1808]

I must be missing something, I get:

[⠊] Compiling...
[⠑] Compiling 99 files with Solc 0.8.26
[⠘] Solc 0.8.26 finished in 666.39ms
Error: Compiler run failed:
Error (9582): Member "contains" not found or not visible after argument-dependent lookup in contract Vm.
  --> lib/openzeppelin-foundry-upgrades/src/internal/StringFinder.sol:17:16:
   |
17 |         return vm.contains(subject, search);
   |                ^^^^^^^^^^^

❯ forge --version
forge Version: 1.0.0-nightly
Commit SHA: 4974a0891bf01511993f49138ebf81f4be207cdf
Build Timestamp: 2025-02-25T09:01:16.709526000Z (1740474076)
Build Profile: maxperf

main branch from openzeppelin-foundry-upgrades
release-v5.3 branch from both openzeppelin-contracts and openzeppelin-contracts-upgradeable

foundry.toml

[profile.default]
src = "src"
out = "out"
libs = ["lib"]

# See more config options https://github.com/foundry-rs/foundry/blob/master/crates/config/README.md#all-options

optimizer = true
optimizer_runs = 20_000

# Required for OpenZeppelin Foundry Upgrades
ffi = true
ast = true
build_info = true
extra_output = ["storageLayout"]

# Allow reading the deployments directory
fs_permissions = [{ access = "read-write", path = "./deployments" }]

Can you let me know what I am missing?