README updates for SDK

[rajkaramchedu]

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Changing the README doc.

[rajkaramchedu]

In the Release Guidelines doc there are references to scripts that are absent. We should remember to fix that in a next PR.

[basfroman]

I would suggest pushing the user to install bittensor in the local python environment created for this purpose.
Kind of

python3 -m venv venv
source venv/bin/activate
pip install bittensor

[rajkaramchedu]

I used "myenv" for my environment name, just to avoid confusion between "venv" command option.

[basfroman]

I don't mind. I just want to add that python -m venv venv is something like a standard in this process that I have encountered most along the way.
But if we want to use the name other than the default one, I would prefer to use something more explicit. For example: python3 -m venv bt_venv or python3 -m venv bittensor_venv.
But again, it's up to you.

[basfroman]

The default SDK installation does not include btcli. To install btcli user need to run the command:

pip install bittensor[btcli]

Even in this case, the command btcli --help will show the btcli version, but not bittensor sdk.
To check the btsdk version, user need to run the command:

python -m bittensor

This can be mentioned below in the step Verify using Python interpreter or/and Verify the installation.

[basfroman]

The community has mentioned many times that they don't want to install a lot of unnecessary dependencies for certain tasks.
I would like to see a section of the documentation where we explicitly highlight this change.

Currently, the user can install the bittensor with several options:

• pip install bittensor - only SDK bittensor;
• pip install bittensor[btcli] - SDK bittensor with btcli (btcli will be installed as an independent tool. Python package name is bittensor-cli);
• pip install bittensor[torch] - Torch package will be installed too;
• pip install bittensor[cubit] - Cubit package will be installed too.

[basfroman]

LGTM for me.