Enforce consistent and correct toml formatting (#2518)

Using taplo, fixes all our broken and inconsistent toml formatting and
adds CI to keep them tidy.

If people want we can customise the format rules as described here
https://taplo.tamasfe.dev/configuration/formatter-options.html

@ggwpez, I suggest zepter is used only for checking features are
propagated, and leave formatting for taplo to avoid duplicate work and
conflicts.

TODO
- [x] Use `exclude = [...]` syntax in taplo file to ignore zombienet
tests instead of deleting the dir

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/primitives/state-machine/Cargo.toml

@@ -22,11 +22,11 @@ rand = { version = "0.8.5", optional = true }
 smallvec = "1.11.0"
 thiserror = { version = "1.0.48", optional = true }
 tracing = { version = "0.1.29", optional = true }
-sp-core = { path = "../core", default-features = false}
-sp-externalities = { path = "../externalities", default-features = false}
-sp-panic-handler = { path = "../panic-handler", optional = true}
-sp-std = { path = "../std", default-features = false}
-sp-trie = { path = "../trie", default-features = false}
+sp-core = { path = "../core", default-features = false }
+sp-externalities = { path = "../externalities", default-features = false }
+sp-panic-handler = { path = "../panic-handler", optional = true }
+sp-std = { path = "../std", default-features = false }
+sp-trie = { path = "../trie", default-features = false }
 trie-db = { version = "0.28.0", default-features = false }
 
 [dev-dependencies]
@@ -37,7 +37,7 @@ sp-runtime = { path = "../runtime" }
 assert_matches = "1.5"
 
 [features]
-default = [ "std" ]
+default = ["std"]
 std = [
 	"codec/std",
 	"hash-db/std",