chore: update .gitignore and improve coding standards documentation

- Added .cursor/sessions/* to .gitignore to prevent session files from being tracked.
- Enhanced coding standards in SKILL.md by adding semicolons to TypeScript examples for consistency.
- Improved formatting in continuous learning, detail layout, and other SKILL.md files for better readability.

These changes aim to streamline development processes and maintain code quality across the project.

.cursor/commands/checkpoint.md

@@ -26,12 +26,14 @@ When verifying against a checkpoint:
 
 1. Read checkpoint from log
 2. Compare current state to checkpoint:
+
    - Files added since checkpoint
    - Files modified since checkpoint
    - Test pass rate now vs then
    - Coverage now vs then
 
 3. Report:
+
 ```
 CHECKPOINT COMPARISON: $NAME
 ============================
@@ -44,6 +46,7 @@ Build: [PASS/FAIL]
 ## List Checkpoints
 
 Show all checkpoints with:
+
 - Name
 - Timestamp
 - Git SHA
@@ -68,6 +71,7 @@ Typical checkpoint flow:
 ## Arguments
 
 $ARGUMENTS:
+
 - `create <name>` - Create named checkpoint
 - `verify <name>` - Verify against named checkpoint
 - `list` - Show all checkpoints