feat: add C implementation for erlang/cdf

[rautelaKamal]

This PR adds a C implementation for @stdlib/stats/base/dists/erlang/cdf.

Closes #3568

Changes

• Added src/addon.c: Node.js native addon entry point

• Added src/main.c: C implementation delegating to stdlib_base_dists_gamma_cdf

• Added include/stdlib/stats/base/dists/erlang/cdf.h: C header file

• Added lib/native.js: JavaScript wrapper for native addon

• Added benchmark/benchmark.native.js: Native benchmark

• Added test/test.native.js: Native tests

• Added manifest.json: Build manifest

• Updated package.json: Added gypfile, include, and src directories

• Read, understood, and followed the contributing guidelines

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/erlang/cdf	$\color{red}248/251$ $\color{green}+98.80%$	$\color{green}10/10$ $\color{green}+100.00%$	$\color{red}2/3$ $\color{green}+66.67%$	$\color{red}248/251$ $\color{green}+98.80%$

The above coverage report was generated for the changes in this PR.