Update README with recent additions

Author: semperos

README.md

@@ -2,7 +2,7 @@
 
 Ari stands for **A**rray **R**elational **I**nteractive programming environment.
 
-Ari is a set of extensions to the [Goal] programming language, also providing an extensible CLI with dedicated SQL mode.
+Ari is a set of extensions to the [Goal] programming language with an extensible CLI and dedicated SQL mode.
 
 ## Installation
 
@@ -26,6 +26,7 @@ Then run `ari` for a REPL or `ari --help` to see CLI options.
   - Runtime configuration:
     - Configure the REPL prompt by setting string values for the `ari.prompt` and `ari.nextprompt` (for multiline input) globals
     - Replace default REPL printing by setting a function value for the `ari.print` global (function receives a single Goal value to print)
+    - Configure the output format with `--output-format` or using one of the `)output.` system commands at the REPL. Formats include CSV/TSV, JSON, Markdown, and LaTeX.
   - `ari.p` is bound to the previous result (value from last evaluation at the REPL)
 - Extensible help system
   - `help"help"` for an overview
@@ -37,7 +38,10 @@ Then run `ari` for a REPL or `ari --help` to see CLI options.
 - New Goal functions:
   - `http.` functions for HTTP requests using [Resty]
   - `sql.` functions for SQL queries and commands
-- Dedicated SQL mode for DuckDB
+  - _(WIP)_ `time.` functions for more extensive date/time handling
+  - `tui.` functions for basic terminal UI styling (colors, padding/margin, borders)
+- Dedicated SQL mode
+  - The ari CLI uses DuckDB, but the `github.com/semperos/ari` Go package doesn't directly depend on a specific SQL database driver, so you can BYODB.
   - Activate with `)sql` for read-only, `)sql!` for read/write modes. Execute `)goal` to return to the default Goal mode.
   - Auto-completion of SQL keywords
   - Help entries for SQL keywords (shown during auto-complete, still WIP)