MOD-8720 command proc macro: add acl and command arguments parameters

[AvivDavid23]

Note

Adds proc-macro and runtime support for declaring command argument specs and ACL categories, and moves AclCategory to a new common crate.

• Procedural macros (redismodule-rs-macros):
  • redis_command! proc-macro: accepts args (typed arg specs with flags/subargs) and acl_categories; generates CommandInfo with command_args and ACL categories.
• Runtime commands API (src/context/commands.rs):
  • Add CommandArgFlags, RedisModuleCommandArg, conversion to raw, and memory free helpers; expose get_redis_command_args.
  • Extend CommandInfo to include args and optional acl_categories; set via RedisModule_SetCommandInfo and RedisModule_SetCommandACLCategories.
• Refactor:
  • Move AclCategory to new common crate and re-export from src/lib.rs; remove old definition from src/context/mod.rs.
  • Make redis_module! macro commands section optional and adjust command registration usage.
• Cargo:
  • Add common crate dependency to workspace and macros crate.

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