build(deps): remove dev-dependencies

[Nugine]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.86%. Comparing base (35e1034) to head (2d08eba).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #60   +/-   ##
=======================================
  Coverage   94.86%   94.86%           
=======================================
  Files          37       37           
  Lines        3855     3855           
  Branches     3855     3855           
=======================================
  Hits         3657     3657           
  Misses        171      171           
  Partials       27       27           

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[Copilot]

Pull request overview

This PR refactors the dependency management structure by removing dev-dependencies and converting them to optional workspace dependencies. The changes centralize dependency version management at the workspace level and properly gate tests that require optional features.

Changes:

• Introduced workspace-level dependency management for heck, http, and regex in the root Cargo.toml
• Converted dev-dependencies to optional regular dependencies with proper feature gating
• Added feature gate to test that depends on the heck crate to ensure it only runs when the case feature is enabled

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Cargo.toml	Added workspace dependencies section with heck, http, and regex versions
crates/const-str/Cargo.toml	Removed dev-dependencies section, converted dependencies to workspace references, updated feature definitions to include dep: prefix, reordered metadata section
crates/const-str-proc-macro/Cargo.toml	Updated dependencies to use workspace references and sorted them alphabetically
crates/const-str/src/__ctfe/ascii_case.rs	Added #[cfg(feature = "case")] gate to test function that uses heck crate
.github/workflows/ci.yml	Removed codecov token field from workflow configuration