Starting up Philo heads, lol

What's Changed

• adding valgrind actions for Philo by @biralavor in #7
• 4 adding pthread_t to t_table by @biralavor in #5
• adding other variables into valgrinds action by @biralavor in #9
• 10 building stronger structure at header by @biralavor in #11
• 12 improve arguments validation by @biralavor in #14

New Contributors

• @biralavor made their first contribution in #7

Full Changelog: https://github.com/biralavor/42_philosophers/commits/v0.1.0