Tracking - docs.rs std build failure fixed with upcoming PR

[Vollbrecht]

if the following PR lands rust-lang/docs.rs#2107 it could help us getting docs build again. A first step is to set meta information inside the Cargo.toml like the following.

[package.metadata.docs.rs]
all-features = true
default-target = "riscv32imc-esp-espidf"
targets = ["riscv32imc-esp-espidf"]

cargo-args = [
    "-Zbuild-std=core,panic_abort",
    "-Zbuild-std-features=panic_immediate_abort",
]

a discussion around the PR and additional upcoming problems for building esp-idf-sys/svc/hal -> https://rust-lang.zulipchat.com/#narrow/stream/356853-t-docs-rs/topic/Zbuild-std.20docs.2Ers.232107