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/client/rpc-spec-v2/Cargo.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-jsonrpsee = { version = "0.16.2", features = ["client-core", "server", "macros"] }
+jsonrpsee = { version = "0.16.2", features = ["client-core", "macros", "server"] }
 # Internal chain structures for "chain_spec".
 sc-chain-spec = { path = "../chain-spec" }
 # Pool for submitting extrinsics required by "transaction"
@@ -47,6 +47,6 @@ sp-consensus = { path = "../../primitives/consensus/common" }
 sp-externalities = { path = "../../primitives/externalities" }
 sp-maybe-compressed-blob = { path = "../../primitives/maybe-compressed-blob" }
 sc-block-builder = { path = "../block-builder" }
-sc-service = { path = "../service", features = ["test-helpers"]}
+sc-service = { path = "../service", features = ["test-helpers"] }
 assert_matches = "1.3.0"
 pretty_assertions = "1.2.1"