Ensure that command usage starts uppercase and ends period (#11278)

# Description

This repeats #8268 to make all command usage strings start with an
uppercase letter and end with a period per #5056

Adds a test to ensure that commands won't regress

Part of #5066

# User-Facing Changes

Command usage is now consistent

# Tests + Formatting

- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting

Automatic documentation updates

crates/nu-command/src/stor/create.rs

@@ -35,7 +35,7 @@ impl Command for StorCreate {
     }
 
     fn usage(&self) -> &str {
-        "Create a table in the in-memory sqlite database"
+        "Create a table in the in-memory sqlite database."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/delete.rs

@@ -35,7 +35,7 @@ impl Command for StorDelete {
     }
 
     fn usage(&self) -> &str {
-        "Delete a table or specified rows in the in-memory sqlite database"
+        "Delete a table or specified rows in the in-memory sqlite database."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/export.rs

@@ -29,7 +29,7 @@ impl Command for StorExport {
     }
 
     fn usage(&self) -> &str {
-        "Export the in-memory sqlite database to a sqlite database file"
+        "Export the in-memory sqlite database to a sqlite database file."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/import.rs

@@ -29,7 +29,7 @@ impl Command for StorImport {
     }
 
     fn usage(&self) -> &str {
-        "Import a sqlite database file into the in-memory sqlite database"
+        "Import a sqlite database file into the in-memory sqlite database."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/insert.rs

@@ -35,7 +35,7 @@ impl Command for StorInsert {
     }
 
     fn usage(&self) -> &str {
-        "Insert information into a specified table in the in-memory sqlite database"
+        "Insert information into a specified table in the in-memory sqlite database."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/open.rs

@@ -24,7 +24,7 @@ impl Command for StorOpen {
     }
 
     fn usage(&self) -> &str {
-        "Opens the in-memory sqlite database"
+        "Opens the in-memory sqlite database."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/reset.rs

@@ -21,7 +21,7 @@ impl Command for StorReset {
     }
 
     fn usage(&self) -> &str {
-        "Reset the in-memory database by dropping all tables"
+        "Reset the in-memory database by dropping all tables."
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-command/src/stor/update.rs

@@ -41,7 +41,7 @@ impl Command for StorUpdate {
     }
 
     fn usage(&self) -> &str {
-        "Update information in a specified table in the in-memory sqlite database"
+        "Update information in a specified table in the in-memory sqlite database."
     }
 
     fn search_terms(&self) -> Vec<&str> {