Add clang-format and clang-tidy to pre-commit hooks

- .pre-commit-config.yaml: Integrate clang-format (v17) and clang-tidy for C/C++ linting
  Excludes build artifacts (.pio), tests, and board configs from linting
- .clang-format: Configure LLVM-style formatting with 4-space indents, 88-char line limit
  Enforces right pointer alignment, comment reflow, consistent brace placement
- .clang-tidy: Configure strict static analysis with snake_case identifiers
  Enables all checks except Fuchsia/LLVM lib checks and abseil checks
  Treats warnings as errors

.clang-format

@@ -0,0 +1,18 @@
+---
+Language: C
+Standard: C99
+BasedOnStyle: LLVM
+IndentWidth: 4
+ColumnLimit: 88
+UseTab: Never
+BreakBeforeBraces: Attach
+AllowShortBlocksOnASingleLine: Never
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: Never
+AlwaysBreakBeforeMultilineStrings: false
+BreakStringLiterals: true
+PointerAlignment: Right
+DerivePointerAlignment: false
+SortIncludes: true
+ReflowComments: true
+MaxEmptyLinesToKeep: 2