* Bump MSRV to 1.67, check with `defmt` feature enabled in MSRV checks where applicable
* Add `esp32c6-lp-hal-procmacros` package to VS Code workspace
* Update `CHANGELOG.md`
* Macro to load LP core code
* Fix imports, add CHANGELOG.md entry
* Avoid code warning
* Omit path from function signature
* More error checking
* Clippy fix
* Include the ELF used by the lp_core_basic example
* Make object dependency optional
* Use 1.65 for RISCV MSRV check
* Use RUSTC_BOOTSTRAP for RISCV MSRV check
* Remove the pre-compiled LP core example
* Pin toml_edit in esp32c6-lp-hal-procmacro