collection factory feature implemented

[feyishola]

closes #341

[Oluwaseyi89]

@feyishola pull our main branch and push again to get updated.

[feyishola]

@Oluwaseyi89 done as requested

[Oluwaseyi89]

@feyishola your PR failed checks. Please, review and ensure your code builds and passes all test before pushing your commits.

[Oluwaseyi89]

@feyishola your PR failed checks. Please, review and ensure your code builds and passes all test before pushing your commits.

@feyishola have you done any modification to your code?

[Oluwaseyi89]

@feyishola are you building the contract at all from your end? See the error its show:

---

seyi@seyi-Latitude-E5450:~/Documents/nftopia/nftopia/nftopia-stellar$ cargo build
warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
package:   /home/seyi/Documents/nftopia/nftopia/nftopia-stellar/contracts/collection_factory_contract/Cargo.toml
workspace: /home/seyi/Documents/nftopia/nftopia/nftopia-stellar/Cargo.toml
   Compiling collection-factory v0.1.0 (/home/seyi/Documents/nftopia/nftopia/nftopia-stellar/contracts/collection_factory_contract)
warning: unused import: `symbol_short`
 --> contracts/collection_factory_contract/src/collection.rs:1:51
  |
1 | use soroban_sdk::{Address, Env, Map, String, Vec, symbol_short};
  |                                                   ^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

error[E0308]: mismatched types
   --> contracts/collection_factory_contract/src/collection.rs:209:13
    |
209 |         for &token_id in token_ids.iter() {  // Use &token_id instead of *token_id
    |             ^^^^^^^^^    ---------------- this is an iterator with items of type `u32`
    |             |
    |             expected `u32`, found `&_`
    |
    = note:   expected type `u32`
            found reference `&_`

warning: unused variable: `start_token_id`
   --> contracts/collection_factory_contract/src/collection.rs:173:13
    |
173 |         let start_token_id = <DataKey as Storage>::get_next_token_id(env, collection_id);
    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_token_id`
    |
    = note: `#[warn(unused_variables)]` on by default

For more information about this error, try `rustc --explain E0308`.
warning: `collection-factory` (lib) generated 2 warnings
error: could not compile `collection-factory` (lib) due to 1 previous error; 2 warnings emitted
 101 seyi@seyi-Latitude-E5450:~/Documents/nftopia/nftopia/nftopia-stellar$ 

---

[Oluwaseyi89]

@feyishola don't worry I'll fix it.

[feyishola]

thank you @Oluwaseyi89