chore: add automatic validation with precommit on CI side

pre-commit will auto-fix formatting and other minor things in the PRs (server-side!), without bugging contributors.  Note how I only added the precommit config file, and the rest of the fixes were auto-contributed by the CI - without bugging the contributors or the maintainers

Note that this requires the repo to be enabled in the https://pre-commit.ci/

Author: nyurik

.pre-commit-config.yaml

@@ -0,0 +1,40 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+exclude: |
+  (?x)^(
+      .+\.(dbc|DBC)
+  )$
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: check-added-large-files
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-shebang-scripts-are-executable
+        exclude: '.+\.rs' # would be triggered by #![some_attribute]
+      - id: check-symlinks
+      - id: check-toml
+      - id: check-yaml
+        args: [ --allow-multiple-documents ]
+      - id: destroyed-symlinks
+      - id: end-of-file-fixer
+      - id: mixed-line-ending
+        args: [ --fix=lf ]
+      - id: trailing-whitespace
+
+  - repo: https://github.com/Lucas-C/pre-commit-hooks
+    rev: v1.5.5
+    hooks:
+      - id: forbid-tabs
+      - id: remove-tabs
+
+  - repo: local
+    hooks:
+      - id: cargo-fmt
+        name: Rust Format
+        description: "Automatically format Rust code with cargo fmt"
+        entry: sh -c "cargo fmt --all"
+        language: rust
+        pass_filenames: false