refactor: build step cleanup

[holic]

pulled out of #2923

• changed configPath to rootDir everywhere, because we almost always want the project root dir and want to avoid using path.dirname in all the downstream tooling
• moved store/world build steps into a single build script so they can reuse vars etc. and map more closely to the mud build command
• renamed all-codegen to all-build because that's actually what it's doing

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[holic]

surprised this hasn't come up before but downstream usages may need to exclude .t.sol and .s.sol

[holic]

ah likely because we're all good about putting source in src but technically possible to have test files, etc. live in this dir as well (and I personally like colocating tests with the files they're testing)

[alvrs]

• let's add a changeset for the changed build cli command
• let's also quickly update this in the docs for this command (just one line): https://mud.dev/cli/tablegen
• should we also change it for the worldgen command for consistency?

[holic]

this doesn't change anything about the CLI commands (they still use --configPath), just the arg name/intent of the internal functions, and shouldn't impact users unless someone imported tablegen from @latticexyz/store/codegen (which feels less intentional)

worldgen hasn't been updated yet, will save this for when I start updating system interfaces