fix: correct Cargo.toml and refactor test utils

Since there is no way we can enable miniscript/no-std for
bdk_chain::miniscript, cargo throws up an error when compiling with
`--no-default-features`. Adding miniscript as another dependency does
not resolve the issue because bdk_chain/miniscript is also required.

Removed unnecessary links from docs as just learned that docs.rs can
infers the links to dependencies.

Author: 110CodingP

crates/testenv/Cargo.toml

@@ -16,7 +16,7 @@ readme = "README.md"
 workspace = true
 
 [dependencies]
-bdk_chain = { path = "../chain", version = "0.23.1", default-features = false, features = ["miniscript"]}
+bdk_chain = { path = "../chain", version = "0.23.1", default-features = false}
 electrsd = { version = "0.28.0", features = [ "legacy" ], default-features = false }
 anyhow = "1.0.98"
 tempfile = "3.20.0"
@@ -26,6 +26,7 @@ bdk_testenv = { path = "." }
 
 [features]
 default = ["std", "download"]
+miniscript = ["std", "bdk_chain/miniscript"]
 download = ["electrsd/bitcoind_25_0", "electrsd/esplora_a33e97e1"]
 std = ["bdk_chain/std"]
 serde = ["bdk_chain/serde"]

crates/testenv/src/lib.rs

@@ -1,5 +1,6 @@
 #![cfg_attr(coverage_nightly, feature(coverage_attribute))]
 
+#[cfg(feature = "std")]
 pub mod persist_test_utils;
 pub mod utils;