feat(table): add TABLEDIT point picking, and consolidate InputKind

- Implement `TABLEDIT` command supporting viewport point-picking on cell interiors
- Support overlapping table hit testing with selection cycling and top-table resolution
- Support `/n` and `\n` multiline paragraph breaks (`\P`) in table cell text editing
- Unify text input modes via `InputKind` (`Point`, `SingleToken`, `FreeText`) on `CadCommand`
- Migrate 15+ commands across annotate, draw, insert, layout, and view modules
- Preserve text casing, literal spaces, and bypass arithmetic eval during FreeText input
- Add dedicated `tabledit_tests` and `free_text_entry_tests` test suites

src/app/update/dynamic.rs

@@ -126,7 +126,7 @@ impl OpenCADStudio {
         let wants_text = self.tabs[i]
             .active_cmd
             .as_ref()
-            .map(|c| c.wants_text_input())
+            .map(|c| c.input_kind().wants_text())
             .unwrap_or(false);
         // A point step that also accepts keyword letters (PLINE A/L/C…) keeps
         // its polar boxes: only letters reach the command line, digits stay
@@ -604,7 +604,7 @@ impl OpenCADStudio {
             let wants_text = self.tabs[i]
                 .active_cmd
                 .as_ref()
-                .map(|c| c.wants_text_input())
+                .map(|c| c.input_kind().wants_text())
                 .unwrap_or(false);
             if !wants_text {
                 if let Some(text) = self.tabs[i]
@@ -645,7 +645,7 @@ impl OpenCADStudio {
             .active_cmd
             .as_ref()
             .map(|c| {
-                (c.wants_text_input() && !c.point_step_accepts_keywords())
+                (c.input_kind().wants_text() && !c.point_step_accepts_keywords())
                     || c.dyn_commit_as_text()
             })
             .unwrap_or(false);