new shell: implement command-line arguments

https://github.com/libsql/libsql/tree/main/src/rust/libsql-shell shell is a modernized rewrite of the libSQL shell.

In order to be fully compatible with the original shell, it should support the same set of command-line arguments.

$ libsql --help
Usage: ./libsql [OPTIONS] FILENAME [SQL]
FILENAME is the name of an SQLite database. A new database is created
if the file does not previously exist.
OPTIONS include:
   -A ARGS...           run ".archive ARGS" and exit
   -append              append the database to the end of the file
   -ascii               set output mode to 'ascii'
   -bail                stop after hitting an error
   -batch               force batch I/O
   -box                 set output mode to 'box'
   -column              set output mode to 'column'
   -cmd COMMAND         run "COMMAND" before reading stdin
   -csv                 set output mode to 'csv'
   -deserialize         open the database using sqlite3_deserialize()
   -echo                print inputs before execution
   -init FILENAME       read/process named file
   -[no]header          turn headers on or off
   -help                show this message
   -html                set output mode to HTML
   -interactive         force interactive I/O
   -json                set output mode to 'json'
   -line                set output mode to 'line'
   -list                set output mode to 'list'
   -lookaside SIZE N    use N entries of SZ bytes for lookaside memory
   -markdown            set output mode to 'markdown'
   -maxsize N           maximum size for a --deserialize database
   -memtrace            trace all memory allocations and deallocations
   -mmap N              default mmap size set to N
   -newline SEP         set output row separator. Default: '\n'
   -nofollow            refuse to open symbolic links to database files
   -nonce STRING        set the safe-mode escape nonce
   -nullvalue TEXT      set text string for NULL values. Default ''
   -pagecache SIZE N    use N slots of SZ bytes each for page cache memory
   -quote               set output mode to 'quote'
   -readonly            open the database read-only
   -safe                enable safe-mode
   -separator SEP       set output column separator. Default: '|'
   -stats               print memory stats before each finalize
   -table               set output mode to 'table'
   -tabs                set output mode to 'tabs'
   -version             show SQLite version
   -vfs NAME            use NAME as the default VFS
   -zip                 open the file as a ZIP Archive

Start in src/rust/libsql-shell and inspect how the new shell currently parses startup arguments and displays --help. Compare its supported options with the original shell's listed arguments, then verify that the requested options are accepted and behave as described when opening a database or running SQL.