feat: improve create-solana-dapp args handling

[beeman]

Some improvements of how the args of create-solana-dapp are handled.

It now supports name as a positional argument, so npx create-solana-dapp@latest my-app instead of npx create-solana-dapp@latest --name my-app.

It's still optional so if it's not provided it will prompt the user.

The second change is that the --anchor flag now accepts none|counter|hello-world, merging the anchor and anchor-template flags.

Some other fixes:

• We have unit tests with snapshots to ensure a certain parameter set yields the expected object.
• The generated anchor project is now called anchor instead of program
• Blank values will be prompted and validated.
• The sync-schemas script passes additionalProperties: false to json-schema-to-typescript to prevent it from adding a [k: string]: unknown property to the schema.d.ts files.

The output is currently like this, we'll have to for in and customize some Nx scripts (or make changes upstream) to make the output of the workspace creation completely silent.

[nickfrosty]

This extra false was printing the extra line on the help menu.
Does not having it set here make the values to not be false by default? Do we need to use the anchor input normalizer to set this default=false?