Improve init

[lukacan]

Currently, the user experience during the initialization process is not the best. For example, during rustc +nightly nothing is shown within the console so it looks like nothing is happening, or it is possible to call trdelnik init on an already initialized workspace. This PR contains a lot of changes that I was trying to avoid, however, there were some unnecessary functions and logic which I think I (hopefully) successfully simplified.

Init command:

• Build - after internal discussion I agree that this command is necessary, as If the project cannot be built It can result in incorrectly generated test files. However as we only support anchor-type projects, instead of calling cargo build-sbf, this is changed to anchor build (we only support anchor-type projects)
• Programs Expansion - The program Expansion function within the Commander was modified to include also very simple progress bar that indicates that something is happening.
  In terms of time, I still think that the rustc +nightly eats most of the time because:
  I tried to benchmark the parse_to_idl_program function which resulted in approximately 25 ms
  Moreover for example fuzz add performs also rustc +nightly with parse_to_idl_program, and this command is almost instant on the already initialized workspace.
• Folders initialization
  Both and PoC test types - check if the program_client folder structure already exists, if so we expect that the program_client is already initialized = skip initializing program client. Check if PoC folder structure already exists if so skip initializing PoC Tests. For Fuzz Tests logic is the same
  Fuzz test types - this test type is now generated without using program_client. We check if the fuzz_tests folder structure is present if so - skip.
• Trdelnik.toml and Updating gitignore
  This is the last step

Build Command

• Checks if Trdelnik.toml is present if so, generate/update program_client. If POC tests are not present (only fuzz tests are present) this will still generate program_client as I found it useful to let the user generate this crate if they want.

Test Command for PoC Tests:

• This command calls the build command and then test

Fuzz Add

• Calls the build command so fuzz test files are correctly generated

Other commands are unchanged

Then there are small changes
I updated templates
I moved most of the constants into one private mod
The snake case program name is in snake case

TODO: add into supported version that SOLANA CLI 1.18 is required to use trdelnik init

[Ikrk]

It looks quite good, but again - it is a monster PR. In my opinion it was not absolutelly necessary to change most of the stuff you changed. I tried to review all changes, but I can hardly guarantee there will be no issues.

Also besides my comments, pls add also at least basic documentation to each new function/method.

Regarding: "TODO: add into supported version that SOLANA CLI 1.18 is required to use trdelnik init" - Don't write todos, Just do it! :-) Btw, is it because of Anchor 0.29.0 that cannot be used without Solana 1.18? I actually removed it from readme, because you could not run anchor anyway. But yeah, we might add it as we now use anchor build behind the scenes...

[lukacan]

Regarding: "TODO: add into supported version that SOLANA CLI 1.18 is required to use trdelnik init" - Don't write todos, Just do it! :-) Btw, is it because of Anchor 0.29.0 that cannot be used without Solana 1.18? I actually removed it from readme, because you could not run anchor anyway. But yeah, we might add it as we now use anchor build behind the scenes...

Yes I think it is because of anchor 0.29.0 as it uses a dependency that needs rustc version higher than the one which is present with Solana CLI 1.17.*.

[Ikrk]

When I wrote basic docs, I meant basic docs ;-) Especially private methods do not need extensive docs.

Please implement the include_str!(concat!( (see my comment above) and we can merge...