fix: Fixed 'ti sdk install' silent fail when copying new modules to dest

[cb1kenobi]

The part of ti sdk install that copies the module files was wrapped in a try/catch, but didn't surface the error.

The try/catch was basically a lazy catch when fs.statSync(destDir).isDirectory() throws for destDir not existing (e.g. new module found). Getting rid of the try/catch shows the error that destDir doesn't exist, which was expected, however throwing was breaking out of all the nested loops when recursively copying the module files to the dest. The solution is to remove the try/catch and use fs.existsSync().

This PR also resolves 2 other related issues.

1. When installing an SDK that is already installed, it prompts the user if they want to overwrite the existing install, but it wasn't also overwriting the modules.
2. There are 3 prompts that were incorrectly handling the return value from a prompt just like what happened in fix: properly handle confirm sdk uninstall prompt response, fixes #645 #649:
   1. SDK install overwrite prompt
   2. SDK uninstall version selection prompt
   3. ti setup user author name prompt

[m1ga]

• reinstalling with an existing 12.3.0.GA - override - works
• reinstalling with an existing 12.3.0.GA - rename - works
• installing lastest without 12.3.0.GA - fails

Downloading https://github.com/tidev/titanium-sdk/releases/download/12_3_0_GA/mobilesdk-12.3.0.GA-osx.zip
  100%  [========================================]

TypeError: Cannot read properties of undefined (reading 'forceModules')
    at Object.onEntry (file:///Users/miga/titanium-cli/src/commands/sdk.js:649:27)
    at async ZipFile.<anonymous> (file:///Users/miga/titanium-cli/src/util/extract-zip.js:57:8)

[m1ga]

normal install works again 👍 Will retest the other ways now, just to be sure
edit: all ways (rename, override, new) works

[m1ga]

working fine now 👍