sudo-suhas / elastic-builder / 19623479558

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feat: Remove lodash dependency (#220)

Replace lodash with lean custom utility functions, reducing bundle
size by 39.8% (71,929 bytes). Implemented eight purpose-specific
utilities in src/_/ directory to handle null checks, type validation,
object manipulation, and collection operations.

Bundle Size Improvement:
- Before: 180,599 bytes (176 KiB)
- After: 108,670 bytes (106 KiB)
- Reduction: 71,929 bytes (39.8%)

Custom Utilities Implemented:
- isNil(value) - Null/undefined check
- isEmpty(value) - Empty value check
- has(object, key) - Own property check
- hasIn(object, key) - Inherited property check
- isString(value) - String type check
- isObject(value) - Object type check
- head(array) - Array first element
- omit(object, keys) - Object key exclusion

Implementation Details:
- Updated 93 lodash imports across src/ directory
- Replaced lodash calls with _.functionName() pattern
- Moved lodash from dependencies to devDependencies
- Maintained for test files only
- All 477 tests pass with 100% coverage
- No functionality regressions
- TypeScript definitions remain valid

693 of 693 branches covered (100.0%)

Branch coverage included in aggregate %.

292 of 292 new or added lines in 91 files covered. (100.0%)

3298 of 3298 relevant lines covered (100.0%)

232.6 hits per line