Auto generated project name includes numerics

[Scowley4]

This change would allow numerics to be included in project names.

Checklist

• I have confirmed that my PR passes all linting checks
• I have included test cases
• I have updated the documentation
• I have added an entry to the changelog

[Scowley4]

I guess now that I'm looking a little more, is the isalpha meant to prevent projects that start with a numeric? As shown:

brownie/brownie/project/main.py

Line 246 in ce8e5bd

sys.modules[f"brownie.project.{name}"] = self # type: ignore

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Python imports can by any identifier:

(letter|"_") (letter | digit | "_")*

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If the changed line is protecting for python purposes, maybe throw an error if the project name actually starts with a numeric. I'm just thinking some projects use versioning in their smart contracts. For example: UniswapV2 vs UniswapV3.

[iamdefinitelyahuman]

Yeah, the check could definitely be modified so that isalpha is only applied to the first digit.

[Scowley4]

Sorry, didn't realize renaming branch would mess up the PR :/

I've added an exception and written a check for the first character of a project/package name, throwing BadProjectName if the character isn't alphabetic.