Suggestions of UX improvement

[jjyr]

ckb-capsule leverage ckb-cli and docker to manage pks and build environment, but sometimes those tools block users' experience.

In #77 , the new version of ckb-cli brokes the capsule's feature. In the end, we need to release a new version to be compatible with the new version ckb-cli. What if a user upgrades the capsule to the latest version but stays with an old version of ckb-cli? The capsule command is still broken!

Capsule requires docker to build binaries. It is for the reproducible build. But when the docker image is x86, you cannot build it on a non-x86 device. To improve the developer's UX, we should support build without docker.

Due to the above reasons, I suggest the following feature/refactoring.

1. Build improvement
   1. Support non-docker mode. Remove the dependency of docker.
   2. Allow customized build commands.
   3. Support multi-language by separated binaries, such as ckb-capsule-rust, ckb-capsule-c, and ckb-capsule-lua.
      1. We can release a new version of language build support without releasing a new capsule.
2. ~~Deployment improvement~~
   1. ~~capsule should output a hexed encoded transaction. Let ckb-cli handle the signing and sending.~~
   2. Remove the deploy command, since ckb-cli support deploy https://github.com/nervosnetwork/ckb-cli/wiki/Deploy-contracts
3. Testing improvement
   1. Manipulate chain context needs to be simplified. The chain should act as a Gananche-like chain simulator.
   2. The transaction build should be simplified.
   3. Reference to system scripts should be simplified.

[blckngm]

Now that ckb-cli supports deployment (https://github.com/nervosnetwork/ckb-cli/wiki/Deploy-contracts), is it still necessary for capsule to have a deployment functionality?

[KaoImin]

Capsule can add the ckb-std dependency to the Cargo.toml file in template.

[duanyytop]

Can Capsule ckb-testtool support the script whose hash_type is type?

[blckngm]

Can Capsule ckb-testtool support the script whose hash_type is type?

Does this work?

https://docs.rs/ckb-testtool/latest/ckb_testtool/context/struct.Context.html#method.create_cell