Re: This is a shame, but I would like to know what BIPs to read for my project

What I'm looking for is to implement the feature of addresses generation, either from a seed or a master public key,

Look at BIP32 and then BIP44. If you want to also see the seed generation stuff, look at BIP39

sending coins to other addresses and addresses validation.

These are part of the original Bitcoin design, so there are no BIPs for them. For address encoding and validation, look at https://en.bitcoin.it/wiki/Base58Check_encoding. For spending Bitcoin, you should read https://bitcoin.org/en/developer-guide#transactions for how transactions work.

Also, it may be a good idea to take a read through guide, reference, and examples on https://bitcoin.org/en/developer-documentation